Pugs vs. monkeys

My father, who recently adopted a pug named Louie from the Detroit Humane Society, emailed me this video with the following message:

Louie would pull the stuffing out their butts in seconds. He barks when he hears the pugs bark in the video.
Nutcase.
Dad

By "Nutcase" I am pretty sure he's referring to Louie. But he could very well be referring to himself.