Imdi, I'm sorry it wasn't your decision to move. I don't mean to suggest that my moving out was what I wanted. I agreed to it as a condition of him staying with me for Christmas and not going to England to see his family. But I will admit it has taken some of the stress off things. For me it means I don't have to stay up and wonder when he'll be home from happy hour. He gets to have some time to himself to actually start to come out of the fog.
Hope, I can see how a puppy would be too much for your H to handle. I'm now living in a house with a parrot and three dogs, one of which is a puppy. My experience is with cats and from my perspective dogs, especially puppies, are a lot of work.
I'm lucky my H feeds and pets our cats and changes the kitty litter. it's actually an improvement. When things were at their worst, my H stopped feeding the cats (it had always been his job) and completely ignored them. It seemed very similar to how many WAH acted toward their children.