Corneal ulcers are one of the most serious eye problems that any dog can experience, and Frenchies in particular are at risk for them. Ulcerative keratitis is the medical term for corneal ulcers. They are incredibly painful and require urgent veterinarian care as failure to receive timely treatment can result in blindness or losing an eye completely. A bully with a corneal ulcer will most likely try to relieve his pain by rubbing the affected eye with his paw or on the carpet. He may close his eyes tightly, and he may have eye discharge.