Unusual visitor wandering through the yard: A young buck with partially mottled white markings; it was very bright, so not a great shot... never seen anything like it.

Unusual visitor wandering through the yard: A young buck with partially mottled white markings; it was very bright, so not a great shot... never seen anything like it.

Never seen one like it
It's evidently a genetic mutation known as "piebald" markings and is quite rare, and often accompanied by otehr (internal) body abnormalities. Most apparently die at birth or when very young. This yearling looked pretty healthy...
You made a new friend.