After finding a lice in the coop, I treated all hens with sevin(1 day ago). In doing that, I noticed that my young buff had a nice infestation. The rest did not. I decided to go on and treat all hens for worms too(administered safeguard orally today). Well, she has been kind of laying around the last few days, but today she is much worse. Sleeping under coop most of the day. And, today, I noticed her just standing at the fence, staring, having a hard time keeping her eyes open. She was totally out of it! On the other side of the fence are three young EE, and she was oblivious to them. But, periodically, she would perk up, notice they were there, and peck them. Then, she would go all spacey again and just stare, not even noticing they were there. Then, she would 'come to again' and 'see' them, interact. This went on for a bit. Kind of asleep with her eyes open. What is this? Could this be from the mites/lice or worm treatment? If it is something else, what? Help? I want these hens back on the path to health asap and she is bad off!