the effect of alternative feeding strategies for broiler breeders (ccsaw - animal welfare symposium)
TRANSCRIPT
The effects of alternative feeding strategies for broiler breeders
Arrazola A., Mosco E., Widowski T.M., Guerin M.T. and Torrey S.
The effect of feed restriction on mortality of broiler breeders
Katanbaf et al., 1989
Ad libitum
Feed restricted
Week 131758 g.
Commercial feed restriction program
HungerFrustration
Lack of satiety
Stereotypies F&O Pecking Overdrinking
Commercial feeding
programs
Control growth
rate
Feed restriction
> 43% of ad libitum feed intake
Feeding strategies to increase feed intake
Reduce feed quality Addition of fiber sources Appetite suppressants
Intermittent feeding frequencies Skip-a-day (SAD) 4/3 5/2 Graduated 36 pullets at week 12
Objective
The objective of this research is to examine the effect of a rationed alternative diet and non-daily
feeding schedules for broiler breeders under commercial simulated conditions
Methodology: housing and experimental design
1,680 Ross 308 females 70 pullets/pen (7.7 birds/m2) 4 isocaloric dietary treatments From 3 to 22 weeks Feeder space: 4 cm/pullet
Dietary treatments
1. Control diet, daily
3. Control diet, 4/3
4. Control diet, graduated
2. Alternative diet, daily
1-5% Appetite suppresant + 40% Fiber
Data collection
Growth rate and body weight uniformity• Random subsample of 25 pullets/pen• Week: 6, 10, 14 and 17
At week 23• All birds were weighed• Maturity score
Aviagen, 2013
mature immature
Data collection
Feather coverage scoreo Subsample of 10 pullets/peno Biweeklyo 0 – 5 score for each area
• Feather loss• Injury presence
Data collection
Foot lesion and hock burn prevalence• Same subsample of birds• Biweekly• Yes/no score
Welfare Quality., 2014
Data collection and analyses
Data collection
Litter moisture• Weekly sampling• 4 subsamples per pen
SAS version 9.4Mixed procedure• Week repeated measure• Pen random effect • Animal id subject• Degree of significance p < 0.05 (*)
Statistics analysis
Results and discussion: growth rate
Treatment x week*
5/2
4/3
Daily
Results and discussion: maturity score
Control Alternative 4/3 Graduated
a a b ab
Results and discussion: feather coverage
Treatment x week*
4/35/2 5/2 Daily
Light intensity
decreased
Results and discussion: litter moisture
Treatment x week*
Heaterson
Results and discussion: foot lesions
Treatment x week*
Conclusion
Fixed 4/3 schedule resulted in lighter and lower percentage of mature birds at the end of the rearing period
Control treatment had worse feather coverage. We hypothesizes that the larger quantity of feed for non-daily and alternative
treatments decreases feather pecking by increasing time spent feeding
Alternative diet increased litter moisture and foot lesions during the first few weeks of rearing
Acknowledgements
AdvisorStephanie Torrey
Advisory committeeTina Widowski
Alexandra HarlanderElijah Kiarie
Michele Guerin
Volunteers & StudentsElyse Mosco
Iran Oliveira Da SilvaAra Khanamtran Candace MartinsGeisa MainardesHillary Dalton
Jacqueline ChowJessica Ellis
Katherine Hobson Lilia Serpa
Marcos Donizete Silva
Marissa Belanco Meagan Coffey Melissa SpeirsMischa Ross
Michelle LopesNatalia Stefanoska
Nicole Bermingham Patrick Birkl Peter McBride
Vinicious Machado dos Santos