Update: Our vet has discovered a problem with Wilson's gait that is related to a lack of muscle development and does require daily "passive range of movement" exercises to strengthen him. Details are available.  Wilson is only a year old, a long lanky fellow who we agreed to take as a transfer from another organization. He's been a lovely fellow so far, and has been enjoying becoming friends with the other dogs. He needs a bit of work on leash but he's getting it! With humans, he is friendly and comes forward for attention. A really nice nature'd young dog. No work with cats as yet.