My cats eye was red and teary?

Pink eye. My cat had those symptoms. As for sleeping a lot, that's just what cats do. I think that you really need to tell your dad that its important to take him to the vet and get the shots he needs. If he's a 3 month old, and he's outdoors, he needs the rabies vaccine. Then if he has pink eye they'll probably give you a type of gel you put on his eye for about 8 days. Please take care of your cat (: