On Sunday morning I noticed bubbles in my Cornish crosses eyes. She is approximately five weeks old, and typical of the breed, a bit overweight. I immediately separated her from the flock, and put her in the chicken hospital. She has a slight bit of congestion, but no runny nose and her eyes look normal now. The bubbly eyes have stopped. I haven't seen them since Sunday morning. This particular chick has always had a bit of sneeze (from one day old and on) but it never amounted to anything nor did the sneeze spread to the other chicks, so I never worried about it. I suppose that my question is, what should I be looking for? I recently switched from larger pine shavings to slightly finer ones, and I'm wondering if it could be the shavings that are causing the problem. Also, how long do I have to wait before it is safe to return her to the flock? She does have a slight amount of congestion and a bit of a sneeze. I'm wondering if I should just treat her with VetRX and wait it out, or if I should go ahead and get some Tylan 50. I guess I'm just a bit confused, and the vet can't tell me much. I'm turning to all of you. Thanks!