My two Ebony and Shayden are now around 14mnths old and have always struggled with too much exercise. They tire quite quickly- i dont know why but they are more stocky than Cooper so ive always assumed that its just the way they are. Problem is Coopers quite a lean and lighter build and lets just say he doesn't walk....he bounces!! Weve been walking them all together and i think hes encouraging the other two to rush about more than they should. In theory they should be able to take more exercise than Cooper as hes only 8mnths old but they are definitely getting more worn out and Ebony was limping on her front leg last night. So i know im going to have to walk separately most of the time but does this mean they cant ever go out together or is it just a case of waiting until Cooper calms down enough so that he doesn't encourage them to over exercise themselves?? Or do i just have to accept that they have different exercise requirements?