Hello. I believe several of my chickens have vent gleet. One of which I have been treating for several months now. They have a lot of the symptoms of vent gleet but one thing confuses me is that they shake their heads a lot. I read that's indicative of possible gape worms, but their butts are nasty... If they have the worms, will it cause them to shake their heads AND have the nasty butt? Does vent gleet cause them to shake their heads also? I do not want to treat them for worms if they do not have it because antibiotics can make the vent gleet worse. Also, I noticed the ones that are affected, have stopped "chatting", or do very little of it now. Help, thanks!!