Most of the time when there are eye bubbles, swelling around the eye, and drainage, it is a respiratory disease. Mycoplasma, infectious bronchitis, and coryza are some common ones. Coryza typically has a very bad odor around the face of the chicken. Tylan is better for mycoplasma, and sulfadimethoxine (Di-Methox) is better for coryza. Here is some info on those diseases: http://edis.ifas.ufl.edu/ps044