With him being a puppy I am sure the rescue group would be able to easily place him. Even with his health issues the documented care by a vet foster/owner would probably make most realize his potential to be a loving pet. I wouldn't leave him home 10 hours. I have made the mistake of getting a puppy in the last year and not being able to be home with him enough. In addition to him needing some good TLC, I feel like the worst person ever when I come home and he looks like he is going to pop from being crated too long (both with energy and being ready to potty). He deserves better but I am hoping some things will be able to change for our situation and help my little man.
You sound like you're realistic in the hurdles for the puppy and as hard as it is I think getting him back in rescue would be the ultimate best life for him and your kitties.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan