Feeding, foraging, and feather pecking behaviours in precision-fed and skip-a-day-fed broiler breeder pullets

Abstract Broiler breeder chickens are feed-restricted to control growth and maximize chick production. Feed restriction creates welfare concerns as conventional skip-a-day feeding can increase activity levels and oral stereotypies during the rearing period. A precision feeding system has been developed to provide small meals to individual birds multiple times throughout a day when their BW is less than a target BW. Objectives of the current study were to investigate whether precision feeding affected: 1) restlessness in broiler breeder pullets, by comparing the prevalence of standing and walking to a flock fed every other day and 2) foraging frustration, by comparing foraging and stereotypic oral behaviours in precision-fed and skip-a-day-fed broiler breeders. Using a randomized complete block design, precision feeding and skip-a-day pens were each represented in 6 blocks (N = 6) with 45 Ross 308 pullets per pen. Skip-a-day-fed pullets were fed at 10:30 am on alternating mornings. Live behaviour observations of pullets (15 min per pen, 12 focal pullets) were conducted during morning (08:00–09:55) and afternoon (13:45–15:40) sessions once per week, from 10 to 21 weeks of age. Behaviours observed during instantaneous 1 min scan sampling included: stand/walk, forage, sit, feather peck, dust-bathe, peck at wing-tag, pecking of the drinker, feeder, or pen wall, and ‘other’ behaviours. Means were reported as different when P  1,10  = 43.97; P  1,10  = 15.37; P = 0.0029), and feather peck (0.16 ± 0.01 vs. 0.03 ± 0.01; F 1,10  = 58.31; P  1,10  = 20.15; P = 0.0012) and drinker pecking (2.60 ± 0.01 vs. 0.15 ± 0.01; F 1,10  = 39.11; P