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Cervantes, \"J Appl Poult Res.\" 24, \"Antibiotic-free poultry production: is it sustainable?\" 91 (2015)","DOI":"10.3382\/japr\/pfv006"},{"key":"1","doi-asserted-by":"crossref","unstructured":"DLM Campbell, TR Dyall, JA Downing, et al. \"Front Vet Sci.\" 7, \"Rearing enrichments affected ranging behavior in free-range laying hens.\" 446 (2020)","DOI":"10.3389\/fvets.2020.00446"},{"key":"2","doi-asserted-by":"crossref","unstructured":"MS. Dawkins, \"Anim Prod Sci.\" 57, \"Animal welfare and efficient farming: is conflict inevitable?\" 201 (2017)","DOI":"10.1071\/AN15383"},{"key":"3","doi-asserted-by":"crossref","unstructured":"JB Golden, DV Arbona, KE Anderson, \"J Appl Poult Res.\" 21, \"A comparative examination of rearing parameters and layer production performance for brown egg-type pullets grown for either free-range or cage production.\" 95 (2012)","DOI":"10.3382\/japr.2011-00370"},{"key":"4","doi-asserted-by":"crossref","unstructured":"DA Sumner, H Gow, D Hayes, et al. \"Poult Sci.\" 90, \"Economic and market issues on the sustainability of egg production in the United States: analysis of alternative production systems.\" 241 (2011)","DOI":"10.3382\/ps.2010-00822"},{"key":"6","doi-asserted-by":"crossref","unstructured":"C Elkhoraibi, M Pitesky, N Dailey, et al. \"Poult Sci.\" 96, \"Operational challenges and opportunities in pastured poultry operations in the United States.\" 1648 (2017)","DOI":"10.3382\/ps\/pew448"},{"key":"7","doi-asserted-by":"crossref","unstructured":"HA. Elson, \"Worlds Poult Sci J.\" 71, \"Poultry welfare in intensive and extensive production systems.\" 449 (2017)","DOI":"10.1017\/S0043933915002172"},{"key":"8","doi-asserted-by":"crossref","unstructured":"F Kaufmann, G Da\u015f, B Sohnrey, et al. \"Livest Sci.\" 141, \"Helminth infections in laying hens kept in organic free range systems in Germany.\" 182 (2011)","DOI":"10.1016\/j.livsci.2011.05.015"},{"key":"9","doi-asserted-by":"crossref","unstructured":"N Sharma, PW Hunt, BC Hine, et al. \"Poult Sci.\" 98, \"The impacts of Ascaridia galli on performance, health, and immune responses of laying hens: new insights into an old problem.\" 6517 (2010)","DOI":"10.3382\/ps\/pez422"},{"key":"10","doi-asserted-by":"crossref","unstructured":"A Schwarz, M Gauly, H Abel, et al. \"Dev Comp Immunol.\" 35, \"Immunopathogenesis of Ascaridia galli infection in layer chicken.\" 774 (2011)","DOI":"10.1016\/j.dci.2011.02.012"},{"key":"11","doi-asserted-by":"crossref","unstructured":"D Hwang, MJ Rothrock, H Pang, et al. \"LWT - Food Sci Technol.\" 127, \"Farm management practices that affect the prevalence of Salmonella in pastured poultry farms.\" 109423 (2020)","DOI":"10.1016\/j.lwt.2020.109423"},{"key":"13","doi-asserted-by":"crossref","unstructured":"C. Yun, \"Dev Comp Immunol.\" 24, \"Intestinal immune responses to coccidiosis.\" 303 (2000)","DOI":"10.1016\/S0145-305X(99)00080-4"},{"key":"14","doi-asserted-by":"crossref","unstructured":"DP Blake, J Knox, B Dehaeck, et al. \"Vet Res.\" 51, \"Recalculating the cost of coccidiosis in chickens.\" 115 (2020)","DOI":"10.1186\/s13567-020-00837-2"},{"key":"15","doi-asserted-by":"crossref","unstructured":"C Dahl, A Permin, J Christensen, et al. \"Vet Microbiol.\" 86, \"The effect of concurrent infections with Pasteurella multocida and Ascaridia galli on free range chickens.\" 313 (2002)","DOI":"10.1016\/S0378-1135(02)00015-9"},{"key":"16","doi-asserted-by":"crossref","unstructured":"B Tarbiat, D Jansson, H Wall, et al. \"Vet Parasitol.\" 286, \"Effect of a targeted treatment strategy against Ascaridia galli on egg production, egg quality and bird health in a laying hen farm.\" 109238 (2020)","DOI":"10.1016\/j.vetpar.2020.109238"},{"key":"18","doi-asserted-by":"crossref","unstructured":"S Diaz-Sanchez, D D'Souza, D Biswas, et al. \"Poult Sci.\" 94, \"Botanical alternatives to antibiotics for use in organic poultry production.\" 1419 (2015)","DOI":"10.3382\/ps\/pev014"},{"key":"19","doi-asserted-by":"crossref","unstructured":"DS. 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