[anonymous]

It’s not unusual for a dog status post any surgical procedure/diet changes/certain medications (buprenorphine is a synthetic narcotic) to have constipation, as long as he has bowel movement within 2 days don’t worry. On day 3 I would give the vet a call (if he has been eating solid food).
I would continue to add water to meals, this will help to move things along.
Also, continue walks/exercise as tolerates, this will help too.
I used plain chicken broth (weak, no onion) ask your friend (retired vet) if this would be okay?