Lately i have been noticing that when i put my hand on Rhun's hips to get him to sit when he is being stubborn and not listening that i feel a popping feeling. Then today he got up and walked of while i had my hand on his back end and his hip pops while he walks. I am very concerned because he is only 9 month old and I have never noticed it in his sister (litter mate). We have only had him about a month and a half and i didn't notice it when we first got him and the vet didn't say anything when we took him in for a vet check and shots and he did check his hips. Should i be concerned? could it be something like arthritis or something worse? He doesn't lay like Adora with the legs spread out behind. When i move and stretch his back legs he doesn't seemed bothered by it, but he is very aloof about everything anyways. He wiggles his back end a lot more than Adora. He isn't overweight, he is actually skinny side. I am really concerned and i don't know what to do. I have just been laid off of work, have major problems with my house, problems with my own health, now this. i don't know if i could even find a way of paying the vet bills if he need surgery, i can barley pay my bills now.