The unnamed male deer is a buck that appeared in "Pups Save the Deer."
In "Pups Save the Deer", he was stuck in slippery ice covering Rock Island's surface, along with his mate. He was then rescued by the PAW Patrol, with some help from Jake.
The unnamed male deer acts just like a typical father of a family. He is shown to be caring for his mate. He is also very concerned about the welfare of his child, responding only to Jake's baby deer call.
He takes the appearance of a typical buck. He has brown and white fur. He also sports the signature antlers, as all other male deer.