Hi there. I'm just wondering how many here have aussies or herding dogs like them. I am running out of things to do with him that are safe for his joints. We hike sometimes 2 hrs a day (with lots of breaks) and play ball and play with toys and work on new tricks and go over old tricks but he just can't seem to get enough. I take him places and let him play with other dogs but a 1 hr nap and he is up and ready to go again. I feel like I am somehow failing him but I think he is getting more then enough time being an "only child" with a "stay at home mom". Any suggestions? Maybe he has a.d.d.