{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T07:25:39Z","timestamp":1791357939577,"version":"4.3.1"},"reference-count":73,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T00:00:00Z","timestamp":1748563200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the Ministry of Culture and Innovation of Hungary","award":["KDP-2021"],"award-info":[{"award-number":["KDP-2021"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>Effective health management during the transition period depends on early disease detection, which can be achieved through continuous monitoring using precision livestock farming tools. This study assessed reticulorumen temperature, rumination time, and activity in dairy cows during the periparturient period under summer heat stress. We hypothesized differences in these parameters between healthy (HE) cows and those developing postpartum disorders (DI). Forty clinically healthy, multiparous cows were monitored from 5 days prepartum to 14 days after calving (days in milk; DIM). A cow was considered healthy and allocated to the HE group (n = 26) if she was not affected by any postpartum health disorders until the end of the study period. A cow was considered diseased and allocated to the DI group (n = 14) if she had been diagnosed with mastitis, metritis, lameness, or ketosis. Weather loggers recorded barn microclimate data, while rumination, activity, and rumen temperature were tracked using a microphone-based sensor in the neck collar (Ruminact HR) and rumen bolus (Smaxtec). THI values remained above 68 throughout the study, peaking at 80, indicating sustained heat stress. Rumen temperature ranged between 39 and 41 \u00b0C and moderately correlated with THI (correlation coefficient was 0.27; 95% CI: 0.20; 0.33; p &lt; 0.0001). Both groups exhibited a nadir in rumen temperature at calving, with no differences. Rumination time declined prepartum, reaching its lowest at 2 DIM in DI cows. It was significantly affected by days around calving, postpartum disorders, and THI. Activity increased prepartum and normalized by 4 DIM in HE cows, while DI cows showed higher activity at 4 DIM, stabilizing by 5\u20137 DIM. These findings underscore the value of precision monitoring tools for early disease detection and intervention.<\/jats:p>","DOI":"10.3390\/ani15111616","type":"journal-article","created":{"date-parts":[[2025,6,2]],"date-time":"2025-06-02T03:19:38Z","timestamp":1748834378000},"page":"1616","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Rumination Time, Reticulorumen Temperature, and Activity in Relation to Postpartum Health Status in Dairy Cows During Heat Stress"],"prefix":"10.3390","volume":"15","author":[{"given":"Szilvia","family":"Szalai","sequence":"first","affiliation":[{"name":"Department of Animal Technology and Animal Welfare, Institute of Animal Sciences, Hungarian University of Agriculture and Life Sciences, 2100 G\u00f6d\u00f6ll\u0151, Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7565-1308","authenticated-orcid":false,"given":"\u00c1kos","family":"Bodn\u00e1r","sequence":"additional","affiliation":[{"name":"Department of Animal Technology and Animal Welfare, Institute of Animal Sciences, Hungarian University of Agriculture and Life Sciences, 2100 G\u00f6d\u00f6ll\u0151, Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9867-0664","authenticated-orcid":false,"given":"Hedvig","family":"F\u00e9bel","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Food Animal Medicine Clinic, University of Veterinary Medicine, 1078 Budapest, Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4801-8459","authenticated-orcid":false,"given":"Mikolt","family":"Bakony","sequence":"additional","affiliation":[{"name":"Centre for Translational Medicine, Semmelweis University, 1085 Budapest, Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6019-3508","authenticated-orcid":false,"given":"Viktor","family":"Jurkovich","sequence":"additional","affiliation":[{"name":"Centre for Animal Welfare, University of Veterinary Medicine, 1078 Budapest, Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"S29","DOI":"10.1262\/jrd.1056S29","article-title":"Monitoring metabolic health of dairy cattle in the transition period","volume":"56","author":"LeBlanc","year":"2010","journal-title":"J. Reprod. Dev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1016\/j.vetimm.2006.03.022","article-title":"Neutrophil and energy status in Holstein cows with uterine health disorders","volume":"113","author":"Hammon","year":"2006","journal-title":"Vet. Immunol. Immunopathol."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Tufarelli, V., Puva\u010da, N., Glamo\u010di\u0107, D., Pugliese, G., and Colonna, M.A. (2024). The most important metabolic diseases in dairy cattle during the transition period. Animals, 14.","DOI":"10.3390\/ani14050816"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1007\/s13280-019-01177-y","article-title":"Dairy intensification: Drivers, impacts and alternatives","volume":"49","author":"Clay","year":"2020","journal-title":"Ambio"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"s187","DOI":"10.1017\/S1751731119003276","article-title":"Review: Sensor techniques in ruminants: More than fitness trackers","volume":"14","author":"Knight","year":"2020","journal-title":"Animal"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Kleen, J.L., and Guatteo, R. (2023). Precision livestock farming: What does it contain and what are the perspectives?. Animals, 13.","DOI":"10.3390\/ani13050779"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Jurkovich, V., Hejel, P., and Kov\u00e1cs, L. (2024). A review of the effects of stress on dairy cattle behaviour. Animals, 14.","DOI":"10.3390\/ani14142038"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"385","DOI":"10.2478\/aoas-2020-0116","article-title":"The effects of heat stress on the behaviour of dairy cows\u2014A review","volume":"21","author":"Herbut","year":"2021","journal-title":"Ann. Anim. Sci."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"423","DOI":"10.1007\/s00484-009-0293-5","article-title":"Changing climate in Hungary and trends in the annual number of heat stress days","volume":"54","author":"Solymosi","year":"2010","journal-title":"Int. J. Biometeorol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"859","DOI":"10.5194\/esd-10-859-2019","article-title":"Heat stress risk in European dairy cattle husbandry under different climate change scenarios\u2014Uncertainties and potential impacts","volume":"10","author":"Hempel","year":"2019","journal-title":"Earth Syst. Dynam."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"094027","DOI":"10.1088\/1748-9326\/aceb79","article-title":"Global risk of heat stress to cattle from climate change","volume":"18","author":"North","year":"2023","journal-title":"Environ. Res. Lett."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"628","DOI":"10.15232\/S1080-7446(15)30421-6","article-title":"Dry period seasonal effects on the subsequent lactation","volume":"28","author":"Thompson","year":"2012","journal-title":"Prof. Anim. Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"10333","DOI":"10.1073\/pnas.1820130116","article-title":"Heat stress directly impairs gut integrity and recruits distinct immune cell populations into the bovine intestine","volume":"116","author":"Koch","year":"2019","journal-title":"Proc. Natl. Acad. Sci. USA"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"86","DOI":"10.3168\/jds.2009-3004","article-title":"Heat stress abatement during the dry period influences metabolic gene expression and improves immune status in the transition period of dairy cows","volume":"94","author":"Connor","year":"2011","journal-title":"J. Dairy Sci."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"19","DOI":"10.1016\/j.cvfa.2007.10.005","article-title":"Colostrum management for dairy calves","volume":"24","author":"Godden","year":"2008","journal-title":"Vet. Clin. N. Am. Food Anim. Pract."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1017\/S0022029920000618","article-title":"Heat stress in dairy calves from birth to weaning","volume":"87","author":"Bakony","year":"2020","journal-title":"J. Dairy Res."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Dado-Senn, B., Skibiel, A.L., Dahl, G.E., Arriola Apelo, S.I., and Laporta, J. (2021). Dry period heat stress impacts mammary protein metabolism in the subsequent lactation. Animals, 11.","DOI":"10.3390\/ani11092676"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Dado-Senn, B., Field, S.L., Davidson, B.D., Casarotto, L.T., Marrero, M.G., Ouellet, V., Cunha, F., Sacher, M.A., Rice, C.L., and Maunsell, F.P. (2021). Late-Gestation in utero heat stress limits dairy heifer early-life growth and organ development. Front. Anim. Sci., 2.","DOI":"10.3389\/fanim.2021.750390"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"5455","DOI":"10.3168\/jds.2019-17218","article-title":"Calving location preference and changes in lying and exploratory behavior of preparturient dairy cattle with access to pasture","volume":"103","author":"Edwards","year":"2020","journal-title":"J. Dairy Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"6812","DOI":"10.3168\/jds.2014-8947","article-title":"Characterization of peripartum rumination and activity of cows diagnosed with metabolic and uterine diseases","volume":"98","author":"Liboreiro","year":"2015","journal-title":"J. Dairy Sci."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Ram\u00f3n-Moragues, A., Carulla, P., M\u00ednguez, C., Villagr\u00e1, A., and Estell\u00e9s, F. (2021). Dairy cows activity under heat stress: A case study in Spain. Animals, 11.","DOI":"10.3390\/ani11082305"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1016\/j.jtherbio.2007.09.002","article-title":"Do changes in feed intake or ambient temperature cause changes in cattle rumen temperature relative to core temperature?","volume":"33","author":"Beatty","year":"2008","journal-title":"J. Thermal Biol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2051","DOI":"10.3168\/jds.S0022-0302(94)77150-2","article-title":"Macromineral nutrition by heat stress interactions in dairy cattle: Review and original research","volume":"77","author":"Sanchez","year":"1994","journal-title":"J. Dairy. Sci."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"4661","DOI":"10.3168\/jds.2007-0835","article-title":"Comparison of reticular and rectal core body temperatures in lactating dairy cows","volume":"91","author":"Bewley","year":"2008","journal-title":"J. Dairy Sci."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"10067","DOI":"10.3168\/jds.2016-11282","article-title":"Is reticular temperature a useful indicator of heat stress in dairy cattle?","volume":"99","author":"Ammer","year":"2016","journal-title":"J. Dairy Sci."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Correia Sales, G.F., Carvalho, B.F., Schwan, R.F., de Figueiredo Vilela, L., Moreno Meneses, J.A., Gionbelli, M.P., and Luiza da Silva \u00c1vila, C. (2021). Heat stress influence the microbiota and organic acids concentration in beef cattle rumen. J. Therm. Biol., 97.","DOI":"10.1016\/j.jtherbio.2021.102897"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Chen, S., Wang, J., Peng, D., Li, G., Chen, J., and Gu, X. (2018). Exposure to heat-stress environment affects the physiology, circulation levels of cytokines, and microbiome in dairy cows. Sci. Rep., 8.","DOI":"10.1038\/s41598-018-32886-1"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"221","DOI":"10.24425\/pjvs.2020.133636","article-title":"Can reticulorumen pH, temperature and cow activity registered before calving act as biomarkers of diseases after calving?","volume":"23","author":"Antanaitis","year":"2020","journal-title":"Polish J. Vet. Sci."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Antanaitis, R., Anskien\u0117, L., Palubinskas, G., Rutkauskas, A., and Baumgartner, W. (2023). The Relationship between reticuloruminal temperature, reticuloruminal pH, cow activity, and clinical mastitis in dairy cows. Animals, 13.","DOI":"10.20944\/preprints202304.0742.v1"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"6052","DOI":"10.3168\/jds.2009-2361","article-title":"Technical note: Validation of a system for monitoring rumination in dairy cows","volume":"92","author":"Schirmann","year":"2009","journal-title":"J. Dairy Sci."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1801","DOI":"10.3168\/jds.S0022-0302(02)74254-9","article-title":"A comparison of methods used to measure eating and ruminating activity in confined dairy cattle","volume":"85","author":"Kononoff","year":"2002","journal-title":"J. Dairy Sci."},{"key":"ref_32","first-page":"180","article-title":"Rumination monitoring: A management tool for early detection of metabolic disorders","volume":"96","author":"Carraway","year":"2013","journal-title":"J. Dairy Sci."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Lamanna, M., Bovo, M., and Cavallini, D. (2025). Wearable Collar Technologies for Dairy Cows: A systematized review of the current applications and future innovations in precision livestock farming. Animals, 15.","DOI":"10.3390\/ani15030458"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"4544","DOI":"10.2527\/jas.2011-5064","article-title":"Relationships between rumination time, metabolic conditions and health status in dairy cows during the transition period","volume":"90","author":"Soriani","year":"2012","journal-title":"J. Anim. Sci."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"4762","DOI":"10.3168\/jds.2017-13706","article-title":"Invited review: Current perspectives on eating and rumination activity in dairy cows","volume":"101","author":"Beauchemin","year":"2018","journal-title":"J. Dairy Sci."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"1","DOI":"10.3168\/jds.2014-8194","article-title":"Rumination activity of dairy cows in the 24 hours before and after calving","volume":"97","author":"Pahl","year":"2014","journal-title":"J. Dairy Sci."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"750","DOI":"10.3168\/jds.2020-18867","article-title":"Calving difficulty influences rumination time and inflammatory profile in Holstein dairy cows","volume":"104","author":"Mammi","year":"2021","journal-title":"J. Dairy Sci."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"3635","DOI":"10.3168\/jds.2013-7709","article-title":"Rumination time around calving: An early signal to detect cows at greater risk of disease","volume":"97","author":"Calamari","year":"2014","journal-title":"J. Dairy Sci."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"2320","DOI":"10.1017\/S1751731117001173","article-title":"Heat stress effects on Holstein dairy cows\u2019 rumination","volume":"11","author":"Moretti","year":"2017","journal-title":"Animal"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"5082","DOI":"10.3168\/jds.2013-6620","article-title":"Rumination time during summer season and its relationships with metabolic conditions and milk production","volume":"96","author":"Soriani","year":"2013","journal-title":"J. Dairy Sci."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"47","DOI":"10.1016\/j.cvfa.2012.11.007","article-title":"Behavioral responses of cattle to pain and implications for diagnosis, management, and animal welfare","volume":"29","author":"Millman","year":"2013","journal-title":"Vet. Clin. N. Am.-Food Anim. Pract."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1179","DOI":"10.1016\/S0093-691X(97)00098-8","article-title":"A lameness scoring system that uses posture and gait to predict dairy cattle reproductive performance","volume":"47","author":"Sprecher","year":"1997","journal-title":"Theriogenology"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"712","DOI":"10.2527\/2006.843712x","article-title":"Environmental factors influencing heat stress in feedlot cattle","volume":"84","author":"Mader","year":"2006","journal-title":"J. Anim. Sci."},{"key":"ref_44","first-page":"137","article-title":"Examination of heat stress caused milk production loss by the use of temperature-humidity indices","volume":"131","author":"Reiczigel","year":"2009","journal-title":"Magyar \u00c1llatorv. Lapja."},{"key":"ref_45","unstructured":"Collier, R.J., Zimbelman, R.B., Rhoads, R.P., Rhoads, M.L., and Baumgard, L.H. (2009, January 7\u20139). A re-evaluation of the impact of temperature humidity index (THI) and black globe humidity index (BGHI) on milk production in high producing dairy cows. Proceedings of the Western Dairy Management Conference, Reno, NV, USA."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"6660","DOI":"10.3168\/jds.2018-16011","article-title":"Influence of on-farm measurements for heat stress indicators on dairy cow productivity, female fertility, and health","volume":"102","author":"Gernand","year":"2019","journal-title":"J. Dairy Sci."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"7088","DOI":"10.3168\/jds.2013-7023","article-title":"Short communication: Rumination and feeding behavior before and after calving in dairy cows","volume":"96","author":"Schirmann","year":"2013","journal-title":"J. Dairy Sci."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"3158","DOI":"10.3168\/jds.2014-9185","article-title":"Short communication: Comparison of estrus characteristics in Holstein heifers by 2 activity monitoring systems","volume":"98","author":"Silper","year":"2015","journal-title":"J. Dairy Sci."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1017\/S0022029917000176","article-title":"Towards practical application of sensors for monitoring animal health: The effect of post-calving health problems on rumination duration, activity and milk yield","volume":"84","author":"Steensels","year":"2017","journal-title":"J. Dairy Res."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"426","DOI":"10.3168\/jds.2010-3239","article-title":"Technical note: Evaluation of a system for monitoring rumination in heifers and calves","volume":"94","author":"Burfeind","year":"2011","journal-title":"J. Dairy Sci."},{"key":"ref_51","doi-asserted-by":"crossref","first-page":"431","DOI":"10.3168\/jdsc.2023-0482","article-title":"Identifying and predicting heat stress events for grazing dairy cows using rumen temperature boluses","volume":"5","author":"Woodward","year":"2024","journal-title":"JDS Commun."},{"key":"ref_52","unstructured":"R Core Team (2024). R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing. Available online: https:\/\/www.R-project.org\/."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"446","DOI":"10.1136\/bmj.310.6977.446","article-title":"Calculating correlation coefficients with repeated observations: Part 1\u2014Correlation within subjects","volume":"310","author":"Bland","year":"1995","journal-title":"Brit. Med. J."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"633","DOI":"10.1136\/bmj.310.6980.633","article-title":"Calculating correlation coefficients with repeated observations: Part 2\u2014Correlation between subjects","volume":"310","author":"Bland","year":"1995","journal-title":"Brit. Med. J."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"1568","DOI":"10.3168\/jds.2016-11884","article-title":"Rumination time and reticuloruminal temperature as possible predictors of dystocia in dairy cows","volume":"100","author":"Ruff","year":"2017","journal-title":"J. Dairy Sci."},{"key":"ref_56","doi-asserted-by":"crossref","first-page":"5988","DOI":"10.3168\/jds.2009-2343","article-title":"Heat-stress abatement during the dry period: Does cooling improve transition into lactation?","volume":"92","author":"Connor","year":"2009","journal-title":"J. Dairy Sci."},{"key":"ref_57","doi-asserted-by":"crossref","first-page":"617","DOI":"10.3390\/dairy2040048","article-title":"The transition period updated: A review of the new insights into the adaption of cows to the new lactation","volume":"2","author":"Mezetti","year":"2021","journal-title":"Dairy"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"1127","DOI":"10.12688\/f1000research.14136.1","article-title":"Re-highlighting the action of PPAR\u03b3 in treating metabolic diseases","volume":"7","author":"Choi","year":"2018","journal-title":"F1000Res"},{"key":"ref_59","first-page":"306","article-title":"Regardless of bacterial load in the vagina, heat stress increases uterine disease incidenceseverity in the dairy cow","volume":"102","author":"Molinari","year":"2019","journal-title":"J. Dairy Sci."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"4474","DOI":"10.3168\/jds.2021-21185","article-title":"Heat stress during the transition period is associated with impaired production, reproduction, and survival in dairy cows","volume":"105","author":"Menta","year":"2022","journal-title":"J. Dairy Sci."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"8788","DOI":"10.3168\/jds.2015-9893","article-title":"Peripartal changes in reticuloruminal pH and temperature in dairy cows differing in the susceptibility to subacute rumen acidosis","volume":"98","author":"Humer","year":"2015","journal-title":"J. Dairy Sci."},{"key":"ref_62","doi-asserted-by":"crossref","first-page":"6751","DOI":"10.3168\/jds.2019-17929","article-title":"Invited review: Physiological and behavioral effects of heat stress in dairy cows","volume":"103","author":"Becker","year":"2020","journal-title":"J. Dairy Sci."},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"253","DOI":"10.24425\/pjvs.2021.137660","article-title":"Evaluation of biomarkers of heat stress using automatic health monitoring system in dairy cows","volume":"24","author":"Antanaitis","year":"2021","journal-title":"Pol. J. Vet. Sci."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"5053","DOI":"10.3168\/jds.2011-4484","article-title":"Validity of prepartum changes in vaginal and rectal temperature to predict calving in dairy cows","volume":"94","author":"Burfeind","year":"2011","journal-title":"J. Dairy Sci."},{"key":"ref_65","doi-asserted-by":"crossref","first-page":"349","DOI":"10.1016\/j.tvjl.2015.05.006","article-title":"Methods and on-farm devices to predict calving time in cattle","volume":"205","year":"2015","journal-title":"Vet. J."},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"267","DOI":"10.3945\/an.112.003376","article-title":"Nutritional interventions to alleviate the negative consequences of heat stress","volume":"4","author":"Rhoads","year":"2013","journal-title":"Adv. Nutr."},{"key":"ref_67","doi-asserted-by":"crossref","unstructured":"Saha, S., Gallo, L., Bittante, G., Schiavon, S., Bergamaschi, M., Gianesella, M., and Fiore, E. (2019). A study on the effects of rumen acdity on rumination time and yield, composition and technological properties of milk from early lactating Holstein cows. Animals, 9.","DOI":"10.3390\/ani9020066"},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"411","DOI":"10.1016\/j.physbeh.2004.08.027","article-title":"Effects of acute stressors on nociception, adrenocortical responses and behavior of dairy cows","volume":"83","author":"Herskin","year":"2004","journal-title":"Physiol. Behav."},{"key":"ref_69","doi-asserted-by":"crossref","unstructured":"M\u00fcschner-Siemens, T., Hoffmann, G., Ammon, C., and Amon, T. (2020). Daily rumination time of lactating dairy cows under heat stress conditions. J. Thermal Biol., 88.","DOI":"10.1016\/j.jtherbio.2019.102484"},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"9057","DOI":"10.3168\/jds.2016-11203","article-title":"Peripartal rumination dynamics and health status in cows calving in hot and cool seasons","volume":"99","author":"Paudyal","year":"2016","journal-title":"J. Dairy Sci."},{"key":"ref_71","doi-asserted-by":"crossref","first-page":"4937","DOI":"10.3168\/jds.2009-2135","article-title":"The effect of dystocia on the dry matter intake and behavior of Holstein cows","volume":"92","author":"Proudfoot","year":"1998","journal-title":"J. Dairy Sci."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"209","DOI":"10.1016\/j.applanim.2012.03.003","article-title":"Parturition progress and behaviours in dairy cows with calving difficulty","volume":"139","author":"Barrier","year":"2012","journal-title":"Appl. Anim. Behav. Sci."},{"key":"ref_73","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1016\/j.applanim.2012.04.002","article-title":"Behaviour around the time of calving in dairy cows","volume":"139","author":"Jensen","year":"2012","journal-title":"Appl. Anim. Behav. Sci."}],"container-title":["Animals"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2076-2615\/15\/11\/1616\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T17:44:21Z","timestamp":1760031861000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2076-2615\/15\/11\/1616"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,5,30]]},"references-count":73,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2025,6]]}},"alternative-id":["ani15111616"],"URL":"https:\/\/doi.org\/10.3390\/ani15111616","relation":{},"ISSN":["2076-2615"],"issn-type":[{"value":"2076-2615","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,5,30]]}}}