Eff ects of Diff erent Floor Systems and the Bird’s Age on Body Weight Gain and Feather Score of Broiler Breeder Hens

Abstract

Purpose: Feathers are known to play a signifi cant role in thermoregulation and provide a physical protection to the birds. Presence or absence of a good feather cover therefore, directly infl uences on a bird’s performance. The study reported herein was conducted to assess the eff ects of fl oor system and the bird’s age on body weight gain (BWG) and feather score in Indian River (IR) broiler breeder hens. Research Method: The experiment was conducted in 2 x 4 factorial arrangements of treatments which included two fl oor systems (slatted fl oor and litter fl oor) and four age groups (23, 32, 38 and 45 weeks). A total of 400 IR breeder hens were assigned to 08 treatments with two replicates per each (25 birds/ replicate) and were fed formulated breeder rations recommended based on the age and the production rate. The body weight, mortality and feather scores were recorded in a two-week experimental period. Findings: A signifi cant interaction (P<0.05) between fl oor type and age was observed for BWG. The highest mean BWG was recorded (313 g/bird) in 23-week old birds kept on slatted fl oors. Overall feather loss (P<0.05) and feather loss in back (P<0.05), wings (P<0.05) and tail areas (P<0.05) of IR breeder hens were the lowest when the birds were kept on slatted fl oors. Increasing bird’s age signifi cantly (P<0.05) increased the overall feather loss and feather loss in back, wings and tail areas. Original Value: The present study concluded that among the age groups tested, the highest BWG of IR breeder hens were recorded at 23-weeks of age when they were on slatted fl oors. The slatted fl oor system was highly eff ective in reducing feather loss in IR breeder hens. Feather loss was increased with advancement of a bird’s age