I'm with you on the chains JUG! I keep most of them on 15-20' chains, and they all have more muscles than most dogs I see. I'd like to think that helps them out in the long run... Plus we have custom swivels that DONT teather up thanks to my hunting buddy. I spray the yard down one every other month, and hit the dogs with bayer or something similar once every three and we're good. Other than that, just consistantly working them on the weekends and feeding them on a regular basis works for me and seems to keep them pretty happy...