We have a english retiever who is a year and a half. The bones in his paws stick out and the vet xrayed saying he will eventually suffer from arthritis.However, when she moved them he showed no signs of pain. He does not lick or whimper, but he lags behind on walks and after the shortest walk will sleep all day. He never liked walking, but he use to at least keep pace with my other two. He is very mischievous and tries to get into everything so he definitely has energy for that and food. I'm wondering if this is a common breed thing or if I should take him again for arthritis. He is from that recherche academy place, and I'm not sure how great their breeding practices are. thanks for any insight!