So she's 5 months old about 66 lbs. I don't let her jump or anything. I have been taking her for light jogs. I go at her pace and she can jog for about 20-30. That's running with fast paced walking. I know you are supposed to be very careful with their joints while they are developing which is why I don't let her do any jumping. I carry her in and out of my SUV. How often should I be jogging with her or is it too soon? She is so much better when she has her jog. She is full of energy and crazy if I don't take her out.