I was given a pit bull puppy who is now about 7 months old. This is our first dog. I think there might be something wrong with his back near his tail. He started this morning whining off and on, not hardly moving, and not eating or drinking. I wasn't sure what was wrong with him so I ran my hand all over him to see if maybe something was hurting him. And when I touch his back right at his tail he yelps. But I don't have the money to take him to a vet right now. Seeing him like this is breaking my heart, but I don't know what to do. Could something be broken? Or what could it be that is causing this? I'm trying to figure out what could have happened for him to be like this. What should I do?