Try Gerber or Beech Nut baby food, meat only, no onion. It's bet

If he is still in pain, he won't want to eat. You have to finger, syringe or spoon feed him so he can recover. If he is still dripping urine, he needs to see the vet again. Check to see if you have a reputable local mobile vet who can come to your home to do the examiniation. This will lessen his stress.