Can anyone let me know how to apply the spray properly? I have five hens and a rooster with bare bottoms from feather eating. I have observed hens on the roost pick at each others backs. I have also witnessed hens plucking downy feathers off their rumps. They are actively searching the nesting box and coop for them.......actively hurting and pecking each other. Now what? I am switching them to feather fixer (higher protein) and adding a new flock block for entertainment. Its not mites or lice. The coop and birds were treated with sevin right before Christmas. Never had this happen before. HELP!