My 9 month old indoor cat seems to have injured his rear paw. It must have happened at night because we have no idea how. He spent all day yesterday on the dining chair/under the dining room table. We knew something was wrong because he has no interest in eating or drinking even though he is very obviously cotton mouthed. It wasn't until he went to the bathroom to use his litter box that qe noticed him limping, favoring his right rear paw. He seems to be able to get up on the couch so I doubt it is very severe but what concerns me is his refusal to eat or drink water. It has been over 24 hours. I need advice as this is my first indoor cat.