 and so when you lose the myelin, the nerve just does not work as well, and it works from the outside in, so they start by losing their ability to know where their feet are, and then it starts to affect their motor nerves, so they can't walk, they become incontinent. So if your dog's using the wheelchair okay, and you're managing okay, and you get a sense, and I really will tell you, do not use logic here. Trust your intuition, and if you feel the dog's still living a good life using the...