OK so i just found out buddy my youngest cat has a URI, i want to know what would happen to him as he gets older.They gave me some medicine a while back but the vet didnt tell me what it was for just said to give it to buddy twice a week.Now im running out of the medicine and dont have enough money to take him for a check up.I just wanted to know what would happend to him in the future? Any input is appreciated.