Originally posted by luckies4me
Head tilt could possibly be due to an inner ear infection and the swelling could possible be an abscess. Have you taken her to the vet? Being blind in one eye is nothing to put an animal down for. My hairless girl Wrinkles (rat) has only one eye, but I love her just the same.

But first see if her symptoms can be cleared before you think about euthanizing her.
Have you taken her to a vet? If so, it might be the best choice.