Until he gets his wheelchair, he crawls around in the yard like a seal - quite quick too! Just the other dog she has (also a rescue) is sort of hyperactive, a mousehunter who stops and starts digging every few step out in nature - but she has to be kept away from him, because she is too rough and wants to play .... I looked at these, but she has to find a place in Austria where they make them to measure, rather than guessing by mailorder. https://www.handicappedpets.com/adjustable-dog-wheelchairs/