About 3months ago my dog took a bad bang and hurt her leg I brought her to the vet he checked here he said he couldn't see anyting got an x ray done was noting there I havnt done anyting with her after till yesterday I let her run and she is grand but qwhen she trots she skips and lifts the back leg I did use and antiinflamatry muscle reliefe pain cream but she still lifts it a bit and walks a bit with a limp I've checked over her and can't see anyting the vet done leg movements on her leg and hip and she didn't yelp as in pain y would she bein doing this its 3 months now so do u tink its a ha