There's some formula, too, and, I can't remember what it is....something like five minutes or something per month of age or something like that. that doesn't sound right at all, but, it's a formula similar to that.....I know my vet and several trainers told me not to let finn do too much until his hips were fully developed. I didn't really let him run or jump too much for a long time. How old is Autumn, now? Maybe just starting out with like an eighth or a quarter of mile with her, and, then conditioning her up to where you're at over a week or two or three...