Evaluation of the effects of infrared beak trimming in broiler breeder chicks

Detailed behavioural observations were made of broiler breeder chicks after their beaks had been trimmed by an automated infrared treatment at one day of age or by the traditional hot-blade method at one day or seven days, or after they had been sham-trimmed or left untreated. Observations took place immediately after the treatments and at regular intervals until six weeks of age; beak length and bodyweight were also measured regularly. There were no significant effects on the behaviour of the chicks in the first hour after trimming or in the subsequent six weeks. Variability in beak length was low within the treatments and there was significant regrowth, but it was least in the birds that had been hot-blade trimmed at seven days. Both beak-trimming methods were associated with small but significant reductions in bodyweight, with the hot-blade-treated birds being more affected.

[1]  P. Glatz,et al.  The absence of neuromas in beaks of adult hens after conservative trimming at hatch. , 1996, Australian veterinary journal.

[2]  J. Craig,et al.  Beak-Trimming Effects on the Behavior and Weight Gain of Floor-Reared, Egg-Strain Pullets from Three Genetic Stocks During the Rearing Period, , 1990 .

[3]  M. Gentle,et al.  Neuroma formation and abnormal afferent nerve discharges after partial beak amputation (beak trimming) in poultry , 1985, Experientia.

[4]  P. Hester,et al.  Beak trimming egg-laying strains of chickens , 2003 .

[5]  P. Glatz.  Beak Trimming Methods - Review - , 2000 .

[6]  D. Waddington,et al.  Behavioural evidence for persistent pain following partial beak amputation in chickens , 1990 .

[7]  I. Duncan,et al.  Behavioural consequences of partial beak amputation (beak trimming) in poultry. , 1989, British poultry science.

[8]  B. Hughes,et al.  An experimental investigation of the costs and benefits of beak trimming in turkeys , 1995, Veterinary Record.

[9]  V. Sandilands,et al.  Ontogeny of behaviour in intact and beak trimmed layer pullets, with special reference to preening , 2002, British poultry science.

[10]  P. Glatz.  What is beak-trimming and why are birds trimmed? , 2005 .

[11]  L. Andrews.  Performance of Broilers with Different Methods of Debeaking , 1977 .

[12]  M. Gentle.  The acute effects of amputation on peripheral trigeminal afferents in Gallus gallus var domesticus , 1991, Pain.

[13]  F. Robinson,et al.  Beak trimming in chickens: historical, economical, physiological and welfare implications, and alternatives for preventing feather pecking and cannibalistic activity , 2004 .

[14]  M. Gentle,et al.  Behavioural and anatomical consequences of two beak trimming methods in 1- and 10-d-old domestic chicks. , 1997, British poultry science.