i started my pup on the spring pole at about 4 months old and he loves it. he stays on it for hours if i let him. i just recently let him have it again cause he was teething and he was pulling his teeth out. he is going on 6 months now and i have moved the spring pole up so his feet are barely touching the ground when he is on it. but i guess my question is will he damage his teeth in anyway? he hasnt pulled anymore teeth out but he loves that thing and i dont want to have to take it away from him again.