I am really scared...
Yesterday, Phoenix apparently started whimpering when he ran. I was at college, and my dad and little sister were playing with him, and he whimpered when he ran after a ball. They checked his paws for problem and found nothing. I didn't feel anything odd in his back legs, where the problem seems to be, though he looks like he is holding one of his back legs at a very slightly different angle, though it is just because I know him so well, nobody else would really be able to tell.
He was having a really hard time getting up the stairs, so we blocked them off. I am terrified he might have something like hip-dysplasia. In all the dogs I have had, I've never had one with that thought, and over the last couple of weeks, I have been excising him pretty hard, trying to keep him stimulated.
From what I have said here, do you guys think that it is more likely that he has just pulled a muscle, or superfically hurt himself? Or do you think it would be something more sinister?
I am 99 percent sure that I am going to take him to the vet's on Friday, and get x-rays done.
I'm just really really scared right now.