I hadn’t read that! Thanks so much for the info! Since she’s got a vet checkup coming up soon, I’ll have my landlord ask the vet specifically for recommendations on what age she can begin and what distances. (She’s part lab, but as I said earlier, smaller and slighter frame.) Any running we’ve done so far has been short distances and slow speed (I’m slow) but if there are any risks associated, we just won’t do it.