I have a sad story to share, but it shows that these babies will lay down their life for you.
My husband had a Yorkie, appropriately named SPIKE, when he was a teenager. His mom lives in the country, with a pond in the back yard. My husband would always stand in this one spot and fish. Well, one day, Spike was standing in that spot, and out of nowhere, an alligator came up out of the water and snatched him up. My father in law killed the alligator the next day, when he saw him out of the water. Poor Spike was still in his belly. My point is, that easily could have been my husband standing there, but Spike was there instead. You have gotta love these babies!