A number of people over the years have asked about those wheeled carts that support the hindquarters of partially paralysed pets.
I recently saw a photo of a Maine Coon in Malaysia, making its way down the walkway using one of these wheeled devices. I asked the owner where the wheels had come from, and this was the reply:
http://www.k9carts.com/
The company's owner very helpful and supportive, the Maine Coon's owner replied. So if you have a paraplegic pet, please consider this as a life-saving option.