Normally, both eyes of a rat are relatively even, sitting on top of the head like small, delicate glass beads. Then, one day you wake up to find a terrifying, disturbing problem has occurred: one of your rat’s eyes is now bigger than the other and bulging, as if it was swollen and ready to pop! Is it possible that the rat has an infected eye? Is it cancer? This really is a creepy situation. Every time I see it, it STILL scares me. I always feel as if the eyeball could pop out, and the imagined visuals are enough to make you cringe. However, I don’t intend to make you hyperventilate and trip over your own two feet in an effort to grab the travel kennel and do 90 MPH on your way to the emergency vet. Let’s take a moment and look at what COULD be going on.