I don't know anything about this program, but generally speaking...17 wks old, so she is 4 months old. They have a lot of energy and could easily do a 20-30 min walk, not sure if you are thinking of running tho. But the thing you need to be careful of is that their bones/joints/tendons/muscles are still developing and can be easily stressed especially on the hard surface of a road or sidewalk. If it were me...
I would start the program now and wait until Bella is closer to 1 year old to bring her into it. It won't take her long to 'catch up' to you especially if you take her out for healthy/safe walks during the next several months. Good luck and keep us posted on your progress!!
