Cow feces was a potential waste as an alternative feed ingredient for poultry. The purpose of this study was to study the phenotypic growth characteristics of broiler chickens fed feed containing fermented cow faeces such as body weight, ration consumption, body weight gain, and ration conversion. This study used 160 DOC broiler chickens. The feed given to broiler chickens is CP11 chicken feed given during the adjustment period at the age of 0-2 weeks, at the age of 3-6 weeks, the feed given is CP11 mixed with fermented cow feces flour as much as 0%, 5%, 10%, 15%. The experimental design used was a Completely Randomized Design with 4 treatments and each treatment was repeated 5 times. Each replication consisted of 8 chicks. The results showed that fermented cow feces can replace commercial feed up to a level of 15% because it can produce good growth and reduce the feed conversion rate of broiler chicken.