Fig 1.
Weight at different ages in chicks from a commercial hatchery (HC) and control chicks (CC), (*)p<0.1, ***p<0.001.
At 20w of age, p = 0.12.
Fig 2.
Egg production in hens from a commercial hatchery (HC) and control hens (CC), a) mean number of eggs (±SEM) per chick per day for each week, and b) mean weight (±SEM) of all eggs laid during each week.
Fig 3.
Severe feather pecking and pecks (nrs of pecks per minute per group (±SEM), in chicks from a commercial hatchery (HC) and control chicks (CC) at 15 w of age, (*) p<0.1.
Fig 4.
a, b Box plots showing the median scores for feather damages on chicks from a commercial hatchery (HC) and control chicks (CC) at 25 w of age where, in Fig 4A) total feather damage, the scale runs from 0–15, and in Fig 4B) from 0–3. The box includes +/- upper and lower quartile and the range includes max and min values. **p<0.01), ***p<0.001.