nah... I dealt with chicken killers before and turn them around... the main idea is to teach the dog to ignore the chooks, always keep calm around the chickens even when they are squawking and flapping around.. divert the dog's attention and keep it on you. The biggest problem with dog and chickens is the chase instinct, stop this and half your problem solved.Well I messed up then! darn it!
We always keep our dogs with other animals, and they are fed raw. Anybody that tell you about "the taste of blood" is not worth listening to.

