Glad to hear that other Yorkies have the same behavior.

Rudy does this, especially at night time. Like last night after we left him out for the last time, he came in the house racing thru the living room behind furniture and then just layed on the sofa. He also tends to want to nip at our pants near our ankles. But then we tell him No and he stops but of course he has to have the last word by barking after that.
Take Care, everyone.
Rudy

& his mom (Dawn)