My husband "chose" our dog from Petfinders.com shortly after his Dad passed away... I took charge of crate training, etc. because we had always been at odds about how to have a pet - husband thought you just got a dog and they stayed outside and if they had an "accident" you rubbed their nose in it, that's how they do it in his family, whereas, I feel a pet should be treated as a family member and live indoors and not outdoors and isolated.
Anyway, the dog is a little high strung (like my husband, LOL!) but never chewed on anything or tore anything up... he's very low maintenance! No visits to the vet other than shots, very easy. Still, my husband just never seemed to bond with him and would occasionally "tease" him in a way that was disturbing to me... he would do things to startle him and then laugh at our dog's distress. I was concerned because that is sociopathic behavior...
NOW when he comes to visit, he is kind to our dog and pets him and is a little bit affectionate and definitely patient if the dog is underfoot (which he always is in this small space!). Our dog is always glad to see him and jumps up with the kids to seek affection when "Daddy" comes home. IF this is an example of a permanent change that comes with MLC, bring on some more! I remember that he cried when he saw his picture on Petfinders and said "that's the one. I want him..." and I had to write an essay proving we would be a good family for him before we were allowed to adopt him. It was a happy day...