One additional note: even put out tuna in water and he started with the noise, moved his head away, then watched other kittens eat. Then he found dry food and ate that. Could he just be stuffed and not getting good smell of the food? The other kittens come running for wet foods, he doesn't.
We took in stray kittens a week ago, they were born to a feral mom. Approx 8 weeks old, have 3 of the original 5 caught - 2 were adopted. One male had runny nose and eyes, mostly clear tears/ discharge, but since vet visit most of it cleared up. Eyes still water a little, but did improve some...
