Bergmann, S., Schwarzer, A., Wilutzky, K., Louton, H., Bachmeier, J.,
Schmidt, P., Erhard, M., and Rauch, E.: Behavior as welfare indicator for the
rearing of broilers in an enriched husbandry environment – A field study, J.
Vet. Behav. Clin. Appl. Res., 19, 90–101, https://doi.org/10.1016/j.jveb.2017.03.003,
2017.
Bessei, W.: Welfare of broilers: a review, Poult. Sci. J., 62, 455–466,
https://doi.org/10.1079/WPS2005108, 2006.
Bilgili, S. F., Alley, M. A., Hess, J. B., and Nagaraj, M.: Influence of age
and sex on footpad quality and yield in broiler chickens reared on low and
high density diets, J. Appl. Poult. Res., 15, 433–441,
https://doi.org/10.1093/japr/15.3.433, 2006.
Bokkers, E. A. M. and de Boer, I. J. M.: Economic, ecological, and social
performance of conventional and organic broiler production in the
Netherlands, Br. Poult. Sci., 50, 546–557,
https://doi.org/10.1080/00071660903140999, 2009.
Bokkers, E. A. M. and Koene, P.: Behaviour of fast- and slow growing
broilers to 12 weeks of age and the physical consequences, Appl. Anim.
Behav. Sci., 81, 59–72, https://doi.org/10.1016/S0168-1591(02)00251-4, 2003.
Butterworth, A.: On-Farm Broiler Welfare Assessment and Associated Training,
Bras. J. Poult. Sci., 15, 71–77, 2013.
Çavuşoglu, E., Petek, M., Abdourhamane, I. M., Akkoc, A., and Topal,
E.: Effects of different floor housing systems on the welfare of
fast-growing broilers with an extended fattening period, Arch. Anim. Breed.,
61, 9–16, https://doi.org/10.5194/aab-61-9-2018, 2018.
Cengiz, Ö., Hess, J., and Bilgili, S.: Effect of protein source on the
development of footpad dermatitis in broiler chickens reared on different
flooring types, Arch. Geflügelk., 77, 166–170, 2013.
Chuppava, B., Visscher, C., and Kamphues, J.: Effect of different flooring
designs on the performance and foot pad health in broilers and Turkeys,
Animals, 8, 1–12, https://doi.org/10.3390/ani8050070, 2018.
Coleman, G. J. and Hemsworth, P. H.: Human-Livestock Interactions: The
Stockperson and the Productivity of Intensively Farmed Animals, 2nd edn., CABI
Publishing, Wallingford, UK, 2010.
Dawkins, M. S. and Layton, R.: Breeding for better welfare: Genetic goals
for broiler chickens and their parents, Anim. Welf., 21, 147–155,
https://doi.org/10.7120/09627286.21.2.147, 2012.
Dawkins, M. S., Roberts, S. J., Cain, R. J., Nickson, T., and Donnelly, C.
A.: Early warning of footpad dermatitis and hockburn in broiler chicken
flocks using optical flow, bodyweight and water consumption, Vet. Rec.,
180, 499, https://doi.org/10.1136/vr.104066, 2017.
De Jong, I. C., Gunnink, H., and Van Harn, J.: Wet litter not only induces
footpad dermatitis but also reduces overall welfare, technical performance,
and carcass yield in broiler chickens, J. Appl. Poult. Res., 23, 51–58,
https://doi.org/10.3382/japr.2013-00803, 2014.
De Jong, I. C., Hindle, V. A., Butterworth, A., Engel, B., Ferrari, P.,
Gunnink, H., Perez Moya, T., Tuyttens, F. A. M., and Van Reenen, C. G.:
Simplifying the Welfare Quality
® assessment protocol for
broiler chicken welfare, animal, 10, 117–127,
https://doi.org/10.1017/S1751731115001706, 2016.
De Jong, I. C., Gunnink, H., van Hattum, T., van Riel, J. W., Raaijmakers,
M. M. P., Zoet, E. S., and van den Brand, H.: Comparison of performance,
health and welfare aspects between commercially housed hatchery-hatched and
on-farm hatched broiler flocks, animal, 13, 1–9, https://doi.org/10.1017/S1751731118002872,
2018.
Dunlop, M. W., Moss, A. F., Groves, P. J., Wilkinson, S. J., Stuetz, R. M., and
Selle, P. H.: The multidimensional causal factors of “wet litter” in
chicken-meat production, Sci. Total Environ., 562, 766–776,
https://doi.org/10.1016/j.scitotenv.2016.03.147, 2016.
Fanatico, A. C., Pillai, P. B., Emmert, J. L., and Owens, C. M.: Meat quality
of slow-and fast-growing chicken genotypes fed low- nutrient or standard
diets and raised indoors or with outdoor access, Poultry Sci., 86, 2245–2255, https://doi.org/10.1093/ps/86.10.2245, 2007.
Fraley, S. M., Fraley, G. S., Karcher, D. M., Makagon, M. M., and Lilburn, M.
S.: Influence of plastic slatted floors compared with pine shaving litter on
Pekin Duck condition during the summer months, Poultry Sci., 92,
1706–1711, https://doi.org/10.3382/ps.2012-02992, 2013.
Ghareeb, K., Awad, W. A., Sid-Ahmed, O. E., and Böhm, J.: Insights on the
host stress, fear and growth responses to the deoxynivalenol feed
contaminant in broiler chickens, PLoS One, 9, 87727,
https://doi.org/10.1371/journal.pone.0087727, 2014.
Goliomytis, M., Tsoureki, D., Simitzis, P. E., Charismiadou, M. A.,
Hager-Theodorides, A. L., and Deligeorgis, S. G.: The effects of quercetin
dietary supplementation on broiler growth performance, meat quality, and
oxidative stability, Poultry Sci., 93, 1957–1962,
https://doi.org/10.3382/ps.2013-03585, 2014.
Graml, C., Waiblinger, S., and Niebuhr, K.: Validation of tests for on-farm
assessment of the hen-human relationship in non-cage systems, Appl. Anim.
Behav. Sci., 111, 301–310, https://doi.org/10.1016/j.applanim.2007.06.002, 2008.
Grandin, T.: On-farm conditions that compromise animal welfare that can be
monitored at the slaughter plant, Meat Sci., 132, 52–58,
https://doi.org/10.1016/j.meatsci.2017.05.004, 2017.
Haslam, S. M., Brown, S. N., Wilkins, L. J., Kestin, S. C., Warriss, P. D., and Nicol, C. J.: Preliminary study to examine the utility of using foot
burn or hock burn to assess aspects of housing conditions for broiler
chicken, Br. Poult. Sci., 47, 13–18, https://doi.org/10.1080/00071660500475046,
2006.
Haslam, S. M., Knowles, T. G., Brown, S. N., Wilkins, L. J., Kestin, S. C.,
Warriss, P. D., and Nicol, C. J.: Factors affecting the prevalence of foot
pad dermatitis, hock burn and breast burn in broiler chicken, Br. Poult.
Sci., 48, 264–275, https://doi.org/10.1080/00071660701371341, 2007.
Hemsworth, P. H., Coleman, G. J., Barnett, J. L., and Jones, R. B.:
Behavioural responses to humans and the productivity of commercial broiler
chickens, Appl. Anim. Behav. Sci., 41, 101–114,
https://doi.org/10.1016/0168-1591(94)90055-8, 1994.
Hepworth, P. J., Nefedov, A. V., Muchnik, I. B., and Morgan, K. L.: Hock burn:
An indicator of broiler flock health, Vet. Rec., 168, 303,
https://doi.org/10.1136/vr.c6897, 2011.
IBM Corp.: IBM SPSS Statistics for Windows, Version 24.0.
Armonk, Released 2016, IBM Corp., NY, available at:
http://www-01.ibm.com/support/docview.wss?uid=swg21476197 (last access: 25 October 2018), 2011.
Jones, R. B. and Boissy, A.: Fear and other negative emotions, in: Animal
Welfare, edited by: Appleby, M. C., Mench, J. A., Olsson, I. A. S., and Hughes, B. O., CABI Publishing, Wallingford, UK, 78–97,
https://doi.org/10.1079/9781786390202.0092, 2011.
Julian, R. J.: Production and growth related disorders and other metabolic
diseases of poultry – A review, Vet. J., 169, 350–369,
https://doi.org/10.1016/j.tvjl.2004.04.015, 2005.
Kaukonen, E., Norring, M., and Valros, A.: Evaluating the effects of bedding
materials and elevated platforms on contact dermatitis and plumage
cleanliness of commercial broilers and on litter condition in broiler
houses, Br. Poult. Sci., 58, 480–489, https://doi.org/10.1080/00071668.2017.1340588,
2017.
Kestin, S. C., Knowles, T. G., Tinch, A. E., and Gregory, N. G.: Prevalence
of leg weakness in broiler chickens and its relationship with genotype.,
Vet. Rec., 131, 190–194, https://doi.org/10.1136/vr.131.9.190, 1992.
Kjaer, J. B., Su, G., Nielsen, B. L., and Sørensen, P.: Foot pad
dermatitis and hock burn in broiler chickens and degree of inheritance,
Poultry Sci., 85, 1342–1348, https://doi.org/10.1093/ps/85.8.1342, 2006.
Knowles, T. G., Kestin, S. C., Haslam, S. M., Brown, S. N., Green, L. E.,
Butterworth, A., Pope, S. J., Pfeiffer, D., and Nicol, C. J.: Leg disorders
in broiler chickens: Prevalence, risk factors and prevention, PLoS One,
3, 1545, https://doi.org/10.1371/journal.pone.0001545, 2008.
Li, H., Wen, X., Alphin, R., Zhu, Z., and Zhou, Z.: Effects of two different
broiler flooring systems on production performances, welfare, and
environment under commercial production conditions, Poultry Sci., 96,
1108–1119, https://doi.org/10.3382/ps/pew440, 2017.
Martland, M. F.: Ulcerative dermatitis in broiler chickens: The effects of
wet litter, Avian Pathol., 14, 353–364, https://doi.org/10.1080/03079458508436237,
1985.
Mayne, R. K., Else, R. W., and Hocking, P. M.: High litter moisture alone is
sufficient to cause footpad dermatitis in growing Turkeys, Br. Poult. Sci.,
48, 538–545, https://doi.org/10.1080/00071660701573045, 2007.
Meluzzi, A., Sirri, F., Betti, M., Bianchi, C., and Franchini, A.: Effect of
stocking density, litter depth and light regimen on foot-pad disorders of
broiler chickens, No. 1715, in: Proc. 22nd World's Poultry Congr. on CD-Rom,
8–13 June 2004, Istanbul, Turkey, 2004.
Meluzzi, A., Fabbri, C., Folegatti, E., and Sirri, F.: Survey of chicken
rearing conditions in Italy: effects of litter quality and stocking density
on productivity, foot dermatitis and carcase injuries, Br. Poult. Sci.,
49, 257–264, https://doi.org/10.1080/00071660802094156, 2008.
Moesta, A., Knierim, U., Briese, A., and Hartung, J.: The effect of litter
condition and depth on the suitability of wood shavings for dustbathing
behaviour, Appl. Anim. Behav. Sci., 115, 160–170,
https://doi.org/10.1016/j.applanim.2008.06.005, 2008.
Nagaraj, M., Wilson, C. A. P., Hess, J. B., and Bilgili, S. F.: Effect of
high-protein and all-vegetable diets on the incidence and severity of
pododermatitis in broiler chickens, J. Appl. Poult. Res., 16, 304–312,
https://doi.org/10.1093/japr/16.3.304, 2007.
Olkowski, A. A., Classen, H. L., and Kumor, L.: Left atrio-ventricular valve
degeneration, left ventricular dilation and right ventricular failure: A
possible association with pulmonary hypertension and aetiology of ascites in
broiler chickens, Avian Pathol., 27, 51–59,
https://doi.org/10.1080/03079459808419274, 1998.
Özhan, N. and Şimşek, Ü. G.: Kafes Sisteminde
Yetiştirilen Etlik Piliçlerde Sürü
Büyüklüğünün Performans, BazıKan ve Kemik
Parametreleri, Musculus pectoralis pH Düzeyi ve Karkas KusurlarıÜzerine Etkisi, Fırat Üniversitesi Sağlık Bilimleri
Veteteriner Dergisi, 29, 1–8, 2014
Pagazaurtundua, A. and Warriss, P. D.: Levels of foot pad dermatitis in
broiler chickens reared in 5 different systems, Br. Poult. Sci., 47,
529–532, https://doi.org/10.1080/00071660600963024, 2006.
Petek, M. and Orman, A.: Age and sex effects on main welfare indicators of
broiler in a commercial flock, Arch. Zootech., 16, 79–87, 2013.
Petek, M., Topal, E., and Cavusoglu, E.: Effects of age at first access to
range area on pecking behaviour and plumage quality of free-range layer
chickens, Arch. Tierzucht, 58, 85–91, https://doi.org/10.5194/aab-58-85-2015, 2015.
Rauw, W. M., Kanis, E., Noordhuizen-Stassen, E. N., and Grommers, F. J.:
Undesirable side effects of selection for high production efficiency in farm
animals: A review, Livest. Prod. Sci., 56, 15–33,
https://doi.org/10.1016/S0301-6226(98)00147-X, 1998.
Reeves, J. T., Ballam, G., Hofmeister, S., Pickett, C., Morris, K., and
Peacock, A.: Improved arterial oxygenation with feed restriction in rapidly
growing broiler chickens, Comp. Biochem. Phys. A, 99,
481–485, https://doi.org/10.1016/0300-9629(91)90037-D, 1991.
Saraiva, S., Saraiva, C., and Stilwell G.: Feather conditions and clinical
scores as indicators of broilers welfare at the slaughterhouse, Res. Vet.
Sci., 107, 75–79, https://doi.org/10.1016/j.rvsc.2016.05.005, 2016.
Sarica, M., Yamak, U. S., and Boz, M. A.: Effect of production systems on foot pad dermatitis (FPD)
levels among slow-, medium- and fast-growing broilers, Eur. Poult. Sci.,
78, 1–10, https://doi.org/10.1399/eps.2014.52, 2014.
Shields, S. and Greger, M.: Animal welfare and food safety aspects of
confining broiler chickens to cages, Animals, 3, 386–400,
https://doi.org/10.3390/ani3020386, 2013.
Sørensen, P., Su, G., and Kestin, S. C.: Effects of age and stocking
density on leg weakness in broiler chickens, Poultry Sci., 79, 864–870,
https://doi.org/10.1093/ps/79.6.864, 2000.
Taira, K., Nagai, T., Obi, T., and Takase, K.: Effect of Litter Moisture on
the Development of Footpad Dermatitis in Broiler Chickens, J. Vet. Med.
Sci., 76, 583–586, https://doi.org/10.1292/jvms.13-0321, 2014.
Wilkins, L. J., Brown, S. N., Phillips, A. J., and Warriss, P. D.:
Cleanliness of broilers when they arrive at poultry processing plants, Vet.
Rec., 153, 701–703, https://doi.org/10.1136/vr.153.23.701, 2003.
Zhao, F. R., Geng, A. L., Li, B. M., Shi, Z. X., and Zhao, Y. J.: Effects of
environmental factors on breast blister incidence, growth performance, and
some biochemical indexes in broilers, J. Appl. Poult. Res., 18, 699–706,
https://doi.org/10.3382/japr.2009-00018, 2009.
Zikic, D., Djukic-Stojcic, M., Bjedov, S., Peric, L., Stojanovic, S., and
Uscebrka, G.: Effect of litter development and severity of footpad
dermatitis and behavior of broiler chickens, Brazilian J. Poult. Sci.,
19, 247–254, https://doi.org/10.1590/1806-9061-2016-0396, 2017.