My adult yorkie, Riley, weighed in at 4 lbs and he was just fine jumping up and down from the sofa onto hardwood floors. While yorkies are predisposed to patella problems, this can occur with daily walking, running, stairs and other normal activities.
I have a 4 mo old puppy, Chloe, weighing in at 2.5 lbs and I don't let her jump down yet, but will when she is older and heartier.
IMHO, I think it's fine for Jaxon to sprint down when excited without causing any problems. |