Where I am in Nova Scotia Canada a friend told me of someone he knew. Whose mother was on the front porch of her house and an eagle swooped down and picked up her 12lb cat.
there are power pylons around here with Osprey (fish hawks) nests on them and at the bottom of the pylon are cat and dog collars.
So take care people. A hawk can and will carry of your Yorkie if it has the chance.