Reliability, practicability and farmers' acceptance of an animal welfare assessment protocol for broiler chickens and turkeys.

This study presents an evaluation of on-farm self-assessment using animal-based indicators to support fattening poultry farmers in managing the welfare of their animals. Self-assessment guidelines elaborated by a German expert group were evaluated together with 11 trained broiler and 11 trained turkey farmers. The participating farmers tested a protocol with 18 indicators for broilers and a protocol with 20 indicators for turkeys on their farms for 1 y. The reliability of individual animal scoring, the practicability of the protocols, their implementation, and acceptance were then evaluated. Reliability was tested during 2 farm visits by the accompanying scientists, using the scientist as a silver standard. On average, the farmers achieved very good reliability (mean PABAK - prevalence-adjusted and bias-adjusted kappa, broilers: 0.90; turkeys: 0.86), with no detectable influence of the previous training method (online versus in-person), the first versus the second visit of the scientists, the fattening stage of the animals scored, number of animals on the farm or the farmers' professional background. The assessment took longer at the end of the fattening period for both animal species. On farms with more personnel and for farmers with a higher position on farm, the assessment was easier to integrate into their work. Most farmers did not fully document their self-assessment and almost no farmer processed and evaluated the data properly, even though it seemed interesting to them. Overall, there was only moderate acceptance of the welfare self-assessment approach, with mixed responses as to whether it provided early warning information or benefits to animal management. Farmers often pointed to the increased cost associated with carrying out self-assessments in terms of the additional working time required, which is likely to be an important barrier to continuing. Digital applications for data recording, processing and evaluation may help to overcome barriers. Overall, it appears unlikely that the welfare self-assessment approach will be widely implemented in the poultry fattening sector without further incentives.