I have a VERY happy dog! She has been "trotsing" a bunch lately. Trotting beside Daddy on his bike is her favorite thing after baths and "ice cream cones" ( whipped cream on a dog cookie ) Tired dogs are happy dogs and mine has been for several trots with the eBike and I must say it makes a difference. Even the Cat has noticed. Crap! My hip doesn't even mind. This ebike is one of the best things I've ever made. GO ON! BUILD YOU ONE! Aint all that spendy.