Behavioural adaptation of laying hens to dilution of diets under mash and pellet form

摘要: Abstract 1. Two laying diets, control (A) and a low‐energy (B) diet diluted by adding 450 g/kg wheat bran, were fed to semi‐heavy hens in three different forms: mash, small pellets large pellets. The behavioural adaptations the production characteristics for these six regimens studied on 72 individually caged hens, between 19 29 weeks of age, subjected lighting pattern 14 h light/24 h. 2. Diet B, as showed lower apparent physical density than others. hardness durability pelleted diets similar. 3. Hens mash B could not completely adjust their food intake compensate dilution reduced egg output body weight gain compared other groups. 4. Video observation each hen consecutive hours that mash‐fed ate longer periods pellet‐fed during first 11 (proportion time spent eating: 41.3% 32.5% A 20% 25% all diets). These differences ...