Good morning everyone! I've been itching to get Holly out for some runs. We go out for a few 15-20 min walks everyday, but I wanted to start taking her for some jogs...probably about 30-40 min in the morning and evening (3 miles each time). She LOVES going out for longer walks and sometimes breaks into running and seems to enjoy it. She is turning 12 weeks tomorrow, and I didn't know if she was too young to be doing such strenuous exercise. Is it true that if you start a puppy running too young, it can impede bone development?