Hi I have an 8 year old cocker spaniel male. He is very active and I take him for two 30 minutes to an hour walks every day. He is absolutely fine on the walks. He runs and catches the ball etc but over the past week he has been struggling with his back legs to get on and off his chair. I was just wanting any advice from anyone who knows anything about this before I take him to the vets. He is still upbeat and happy just not using his back legs as normal. Any advice would be great thank you.