LOL! You little stinker, Rosie.
Jackson did this one - except it was a whole herd of them (are deer a herd or a flock? LOL) Anyways... he took off and at first I panicked - then I had to laugh. Here was my 16lb dog rounding up probably 10-15 deer who were all terrified of him, LOL. Poor things.
We live on 3 acres but our backyard is 90 acres of farmland so we get a lot of them. That was the only time he's actually seen them and decided to make a run for it

He broke a leash in the process.
He came running back completely filthy and VERY proud.