Placing Deficits?

I'm sad today. I don't want to get out of bed. The vet told me Louie has "Placing Deficits" in his hindquarters and he can no longer "jump" or go up and down stairs. He can no longer be in the bed because of the height, and that it could be the start of a serious condition. I can't take any more heartache. I just can't.