u/hiljen26

I took a 6 year old dog in from my sister who is moving. She got him from the shelter. He has done really well with my other 2 bigger dogs, no issues. He despises our puppy. The puppy is still learning boundaries which we are working on. Older dog will sometimes go after the puppy a little bit, he has no tolerance for puppy. What would you do in my situation? My sister didn’t put very much effort into him I think. We have had older dog for 2 months and have taken it slow with them but no luck so far.