This morning I heard my dog whining while he was moving around on the bed. When I got up to take him out, I could tell he didn't want to jump down so I picked him up but when I touched near his hind quarters that's when he started whining again. When I took him out to go to the bathroom he was very slow (very unusual) and did not seem to want to come back inside afterwards. I had to bribe him with some cheese in his food bowl which did make him eat but now he is just laying in his cage (something he never does). Please help, we're so worried

He also won't drink the water we gave him.