I have a Polish and a naked neck that I have been with me for five years plus. I have six birds total but in referring to my two that I mentioned first they're acting weird lethargic puffed up feathers and not foraging as much they're kept in a large enclosure they have a coop that's draft free I have poop boards that I cleaned regularly and have not noticed anything unusual and I just did I dusted them t a week ago for lice which wasn't very heavy on them using diatomaceous earth. They have constant access to fresh water and they're getting layer crumble they don't have any obvious respiratory illness but they look kind of miserable. I have rooster booster triple action warmer that I mixed up with their food and I'm going to give it for five days. What else should I be doing? I've had chickens for five or six years and I end up getting an occasional infrequent sick bird and I'm always perplexed if you look at my last posts in the past usually it's trips to the vet and lots and lots of money which I've decided to hold back on doing this time around as money is tight at the moment. Advice? Thank you.