Pecking preferences in young chicks: Effects of nutritive reward and beak-trimming

Workman, Lance; Rogers, Lesley J.

doi:10.1016/0168-1591(90)90092-r

Cited by 15 publications

(4 citation statements)

References 12 publications

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“…An increase in play eating after beak trimming may possibly be explained as a result of phantom sensations or an increased stimulation of the beak. It is also possible that beak trimming may reduce the ability of the pullet to pick up food, as was found in another study (Workman and Rogers, 1990). The increased number of pecks per gram of food may indicate that beak trimmed pullets have reduced mechano-reception ability as a result of the altered beak shape, although a similar effect was not found after re-trimming.…”

Section: Discussionmentioning

confidence: 73%

Changes in Behaviour of Laying Hens Following Beak Trimming at Hatch and Re-trimming at 14 Weeks

Jongman¹,

Glatz²,

Barnett³

2008

Asian Australas. J. Anim. Sci

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For many years beak trimming has been a controversial subject, particularly since the 1980's when the practice came under close scrutiny by animal welfare groups. In Australia it is considered an essential practice, averting losses of AUD$17.5m annually by reducing mortality from cannibalism. While mortality in flocks from cannibalism can be reduced from 25% of the flock to virtually nil, the beak trimming procedure is considered traumatic for the bird. This study examined if chronic pain in the beak was evident in birds 10, 20 and 60 weeks after being trimmed at hatch and in another group of birds, 8 and 52 weeks after being re-trimmed at 14 weeks. Chronic pain was assessed by measuring pecking behaviour and beak sensitivity responses. Pecking behaviour studies completed after beak trimming and re-trimming showed no evidence to indicate that birds were suffering severe chronic pain in the beak. Beak trimmed pullets pecked more at the cage and had more toe pecks, yet overall pecks made at the feed and the environment were no different than untrimmed controls. While the beak sensitivity studies provided evidence that the beak of birds trimmed at hatch and also re-trimmed at 14 weeks may be more sensitive there was no evidence that re-trimming resulted in a more sensitive beak than birds trimmed at hatch only. These studies have shown that birds which are beak trimmed and re-trimmed return to apparently normal feeding and pecking behaviour in the long term. However, there was limited evidence that beaks of trimmed birds have an altered threshold to potentially painful stimuli.

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Section: Discussionmentioning

confidence: 73%

Changes in Behaviour of Laying Hens Following Beak Trimming at Hatch and Re-trimming at 14 Weeks

Jongman¹,

Glatz²,

Barnett³

2008

Asian Australas. J. Anim. Sci

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“…Workman and Rogers (1990) concluded that decreased pecking efficiency was not the only factor causing reduced food intake; they showed that food consumption was less rewarding for beak-trimmed birds and suggested that their motivation to feed had been depressed.…”

Section: Adverse Effects On the Birdmentioning

confidence: 99%

Beak trimming of poultry: its implications for welfare

Hughes

Gentle

1995

World's Poultry Science Journal

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Beak trimming remains a controversial subject. It has undoubted economic advantages for the producer, in particular by reducing the incidence of cannibalism and feather pecking, but the procedure is traumatic for the bird and deprives it of important sensory feedback from its beak. It can have harmful neuroanatomical consequences: although the tissue damage is repaired the sensory receptors are not replaced, neuromas may form and become a source of chronic pain. The danger of neuroma formation is reduced and may be absent if the procedure is performed only in young birds. Beak trimming results in both immediate and more persistent effects on behaviour, food intake and body weight. Trimmed birds are generally less active, show less behaviour involving pecking, eat less and grow more slowly than controls. These changes are primarily a consequence of the sensory deprivation. In caged medium hybrid layers and growing broilers beak trimming is difficult to justify, whereas the incidence of pecking damage is so high in light hybrids in multi-bird cages at high stocking densities that beak trimming is universal. A case can also be made for its continuation, on welfare as well as on production grounds, in floor-housed flocks of laying fowl and breeding turkeys. In these contexts it reduces mortality by inhibiting feather pecking, cannibalism and, possibly, aggressive pecking. In the long term beak trimming should be phased out and undesirable behaviour controlled by environmental means and by increased effort being devoted to the genetic selection of commercial stocks which do not engage in damaging pecking, either in cages or when floorhoused in large flocks.

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“…In this respect, pullets were beaktrimmed immediately after hatching which might have reduced FI early in life in birds fed mash. Also, the size of the crumbles used might have been bigger than required for very young pullets and might not have fit well the beak of the bird, resulting in an increase in feed wastage (Workman and Rogers, 1990). After the first week of life, however, GIT development and capacity might be sufficient to meet energy needs of the pullets.…”

Section: Methodsmentioning

confidence: 99%

“…Probably, very young birds prefer crumbles to mash feed because of the better adaptation of the beak to consume processed feeds. Also, it was probable that FI was not higher in pullets fed the crumble diets but that the feed wastage was higher because the crumble might not have fitted the beak of the pullets (Workman and Rogers, 1990). In any case, after the first week of age, the increase in beak size facilitated feed consumption and crumble was not a potential problem anylonger, leading to a reduction of feed wastage with crumbles compared with mash (Mateos et al, 2002;Serrano et al, 2013).…”

Section: Effect Of Feed Form Of the Diet On Productive Performance Ofmentioning

confidence: 99%

Influence of nutritional strategies on growth performance and digestive tract traits of brown egg laying pullets and subsequent effects on egg production

Medina¹

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Agradecimientos¡Y yo que pensaba que esto era la parte fácil de la tesis! No paran de venirme a la cabeza nombres de personas a las que tengo algo que agradecer por haberme ayudado de una manera u otra durante estos cuatro años y medio.Si estás leyendo esto y no encuentras tu nombre, pero crees que debería estar, perdóname, sois tantos que no es difícil que alguno se me escape. Creéme si digo que te lo agradezco de corazón.En primer lugar, porque seguramente sean los primeros en leer estas líneas, me gustaría agradecer a todos y cada uno de los miembros del tribunal que han aceptado evaluar esta tesis y estar presentes el día de mi defensa. Gracias por buscar un hueco en vuestras apretadísimas agendas y ayudarme en este momento tan importante.A los doctores Hans Stein y Edgar García Manzanilla, por aceptarme en sus respectivos grupos. Nunca olvidaré la conjuntivitis que cogí en Estados Unidos por limpiar la nave con agua a presión con las lentillas puestas, ni tampoco el miedo que llevaba en el cuerpo cada vez que conducía por las maravillosas carreteras irlandesas.Bromas aparte, gracias a los dos por permitirme vivir dos de las mejores experiencias de mi vida.A todos los profesores del departamento que de una manera u otra me han ayudado a lo largo de estos años. Ya sea porque he tenido la suerte de ser su alumna durante el desarrollo del máster o porque me han recibido con una sonrisa cada vez que me surgía alguna duda y acudía a ellos. La primera a Rosa Carabaño, que para algo es la jefa, gracias por preocuparte de que todo se haga como tiene que hacerse y por procurar el bienestar de los becarios precarios. A Carlos de Blas, por no tirarme algo a la cabeza cada vez que acudía a él a preguntarle las mismas dudas de estadística. Nos costó mucho hacer entender a Gonzalo que con un control había que hacer un Dunnett y no el Index of contents 4 "general model". A Mª Jesús Villamide, Javier García y Nuria Nicodemus, porque gracias a ellos me sé de memoria cómo funcionan las naves de los Campos de Prácticas y cómo se hacen la mayoría de los análisis de laboratorio. A María Alvir, por tener siempre una sonrisa en la cara, así da gusto empezar los lunes. A Javier González, por amenizarnos los cafés con sus historietas. A David Menoyo, por su paciencia y ayuda con las siembras y conteos microbiológicos, después de dos años conseguimos terminar de contar. A Rosa Lázaro, por sus consejos durante más de 4 años y porque gracias a ti sé lo que es el Brill y tengo a quién acudir cuando me dé cuenta de que realmente no sé usarlo. A todos vosotros, un millón de gracias.A Carlos Rodríguez, por la infinita paciencia que tiene con todos los que vamos a llamar a su puerta. Sabes que si tú no estuvieras el departamento sería un caos. ¿Quién si no le enchufaría el teclado a Gonzalo cuándo tuviera una crisis histérica porque el ordenador no funciona?A Andrés, por su ayuda en el laboratorio en innumerables ocasiones. ¿Cuántas horas de sueño de más llevaremos en el cuerpo porque Andrés estaba a las 7 de la mañana en el laboratorio hac...

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Pecking preferences in young chicks: Effects of nutritive reward and beak-trimming

Cited by 15 publications

References 12 publications

Changes in Behaviour of Laying Hens Following Beak Trimming at Hatch and Re-trimming at 14 Weeks

Changes in Behaviour of Laying Hens Following Beak Trimming at Hatch and Re-trimming at 14 Weeks

Beak trimming of poultry: its implications for welfare

Influence of nutritional strategies on growth performance and digestive tract traits of brown egg laying pullets and subsequent effects on egg production

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