I have a 5 yr old female boxer and she has been in good shape up until several months ago. Back then she started favoring her left hind leg. She would be fine when I let out both of my boxers (also have 2 yr male boxer) from the dog run when I get home but she would lift that hind leg and walk on 3 legs for a while. She's been to the vet 2 times now and they're not sure what is going on. The 2nd time I took her in they did the x-ray and checked her out good. The doc didn't really think it was an ACL, he thought her hip was ok, etc. He did give her something for pain for several weeks and a vitamin that I gave her 3 times a day to promote joint health and she was on that for about a month. He also thought I should take a bit of weight off her so I cut back on her food accordingly and she looks like she's shed a few pounds. Since the pill ran out she has started to regress and lift that leg more. The original vet recommended taking her to more of a specialist and that's where we are now. Does this sound like an ACL tear or hip or what? I've noticed the area just above her tail on the flar of her back is wet a lot and thinking she must be licking that area or maybe biting that area. She doesn't have fleas either. He mentioned that the ACL surgery could run as much as $4K if that turns out to be the case. Any ideas or suggestions? Thanks.