Well, it was bound to happen. I let Yoshi out the back door this morning after he was done eating breakfast for his morning constitutional.
As soon as Yoshi got outside I saw the buck standing in the middle of the back yard. The buck bolted, then Yoshi saw him and started to give chase.
I called Yoshi (rather loudly for 6:30 am) a couple times, and he stopped in the yard and looked back at me. By this point the buck was gone, and Yoshi returned to the job at hand.