I was hoping someone had experience with this. I have 15 4-week old chicks in a 6x8 coop. They are all different breeds, along with 2 polish. Ever since they started growing their crests the chicks all have been "sampling" the new feathers. I did separate the banty once when they got a pin feather and her poor head was looking bruised. I put her back and no more blood, but everyone is still trying to taste their poor crest feathers. They always have nappy looking wet crests. Someone told me to use WD40 so that it tastes bad, but that just seems oily, fumey and unsafe to be that close to a chick's head. Then I thought- what about Bitter Apple? I think I'm going to try it so see what happens but if anyone has any thoughts, please speak up! I imagine since it's safe for animals to ingest, and I don't spray it into their eyes, they'll be fine, but I'm not sure. Any other remedies? It's not a wound, so not using Blu-Kote. TIA!