Golden Lover,

I know exactly what you mean. Given that both my Yorkies use their mouths like hands, it's hard to teach them not to bite. When both were young (2 years apart) their teeth are SO sharp, it's hard to tell if they're just holding, or biting !!

I think it must be something that my (older Male) Sneakers taught my (younger female) Becca, but both do what I call a "Rampage" !

When we get to playing hard, either of them will just take off at as high of speed as the area allows, run around furniture, back and forth, or when in the yard, XX high speed sprints, quick turns, I guess showing me how agile they are. I can't think of any other reason, other than energy to burn, ha !

Have a good Day !
S.W.