Give it time...he is young. If he is peeing okay on his own, don't try to force him.

You might want to get some kitten food, which has more nutrition. When you get a second opinion, ask about supplements or something that will help the healing.

Omega 3 oil is supposed to be very good, found in salmon...but check with your vet on this.

Good luck!

hugs (gentle) to JoJo