I started a post similar to this one not too long ago..haha. My yorkie-poo does the same thing! She goes pshyco! Your not the only one..
I think it's just something they have to get out of their system. Kinda like how we women need chocolate sometimes.. lol...it's like that sort've for our dogs. They need "their" time to get whatever it is out of their system. haha.
