Hey so I have 2 dogs. One is a border collie red healer and I have been having some issues with lately. We got him as a puppy and have had him for a year and a half now. Lately he has been growling and snarling at my wife when I’m not there or when she goes to put him in his kennel. I wasn’t too concerned at first because he does the same for me and I figured it was just him letting us know he doesn’t like it. But sometimes when my wife gets after him for something he will bark and snarl at her. Just the other day she was just trying to get him to move so she could sweep where he was and he growled at her again. She went to just scratch him and let him know he wasn’t in trouble and he snapped at her face. I’m not sure what to do about this or even what would cause this. He is the sweetest dog and is amazing with kids and super protective. I just don’t know how to fix this