If your cat was missing for several days and returned home it is possible that this could be a different cat. Have your cat examined by a veterinarian. The wet eyes could be a sign of conjunctivitis or upper respiratory infection. This disease complex could also cause increased interest in wet food. When cats have a congested nose their sense of smell is decreased and this leads to decreased interest in food. Canned food has a stronger scent so when cats are congested they are more likely to eat it.