One of our very healthy and happy five month old male guineas started acting sick yesterday, laying on the floor of the coop and not coming out. When we pushed him to come out, he stumbled around in circles and we noticed he had one completely clouded eye (doesn't look like he can see at all out of it). After staggering around in circles, he would flop down with his neck and head turned backwards resting on his back and then would fall asleep. I've tried Poly Vi Sol directly on his beak but he doesn't really seem to be getting any down, he gets agitated if we get too close to him (our guineas are pretty wild) and he's not eating or drinking anything, even though we've isolated him with his own water and food. I'm guessing there's nothing else we can do, but just thought I'd put it out there and see if this sounds familiar to anyone. Our local feed store experts (they really are great and have given us excellent advice for the past 5 months) said it sounds neurological and probably not from anything we could control or do differently. Our flock free range and all coop up at night. Thoughts?