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Synopsis
A total of 180 crossbred Chinese/Emden goslings were either housed indoors for 8 weeks or kept inside for 4 weeks and then allowed to graze. Within each experimental group the birds were fed on diets with or without added penicillin. The antibiotic was included at either 55 mg/kg or 110 mg/kg.
Only when the goslings were fed throughout on a diet supplemented with penicillin at an inclusion rate of 110 mg/kg was there significant growth promotion.
No significant differences in the weights of the liver, gizzard, small intestine or caeca, or in the average weights of 1 cm lengths of the small intestines and caeca could be detected.