Hi, I just got a 5 month old from a reputable breeder. He couldn't make it into conformation because one of his back leg or ankles isn't completely straight. It's hard to notice without someone pointing it out. He runs and walks fine but after every nap, he limps on that one leg for a few seconds and then he's all better. I first thought because he was sleeping awkwardly in his crate, his leg fell asleep, but it's always that one leg. I had the vet examine it during his check up and after a few minutes she didn't find anything wrong. She says that sometimes smaller breeds accidentally pop their joints and then pop it back in place. Has anyone ever experienced this? The breeder, who's very sweet, said she saw him do it once but he probably did it more and she didn't notice because she has a lot of them in her house running around.