running a young dog is hard on their still forming joints....someone above mentioned starting a 5 month old, now running at 11 mo 3-6 miles...
what will happen is that at 5 or 6 the dog will be really really arthritic....sure they will do it now, and enjoy it....but when the dog is older, you will find out what a mistake this is!!!!
I had a pup about 6 months old....let her come out with me working horses....we did maybe a mile and a half to an area where we had an "arena" set up for training...the dog rested or ranged around freely...at six the dog could barely get up and down it was so arthritic....lived to 14 tho....just in pain (had meds!) most of its life....(this was in the 70's!!!)
Please curtail that pups running - it is probably too late, but don't make it worse...
Csabre Sch1, Hexe Sch2, SG Bengal, Lynx, Komet, Kira HGH & Kougar v Wolfstraum ~ Ziberia IPO1 ~ ATB Basha, Kougar & Kyra, Fenja, Sch3s, Cito, Sch2, Danger RH & Alice Sch1s ~Kelsey