Oh my! Prayers, love, and good thoughts being sent to both your grandmother and Magoo!

When a loved one goes into the hospital, it can definitely through a household out of whack. Magoo's probably just picking up on all the stress going around. And I have to agree that part of it could be the eye bump. Like K&L suggested, you might want to try dropping him off at the vet and then pick him up when it's most convenient for you.