I had a chook with a limp, and the other 2 were attacking her, and ripped her comb. so while she was separated resting her leg (its fine now) we kept her close to the others, who still tried to attack her. So I got the spray hoping it would disguise the blood on her comb/head, and unfortunately it made it worse, it is REALLY bright and the others picked on her immediately for a few days, I had to fully separate them again for a few days, they've finally stopped fighting, but I think it's more because the violet has faded and her leg is ok. Wouldn't recommend it for disguising the blood unless you can keep a very close eye