My 8 month old Yorkie, Tegan hides all of his toys and even his bones and treats. It is so funny. I find them all over the house...in the laundry under the furniture, in my closet, under my pillow, everywhere! He will place it where he wants it then burry it with whatever he can find...he is so cute rooting around with his nose making sure no one will find his treasures. Do your Yorkies do this? Also, I was so proud the other day when I told Tegan "Go get your bone" and he went and got it (from under the bed) and brought it over. He had never done that before...what a smart pup! Just had to brag a little