"As a human who is fluent in dog, let me start by saying dogs do tell you when they are upset," an expert told Newsweek.

The deleted scene, which you can check out in the video at the top of the page, is titled “Petey Puppet Time” and it sees Petey trying to get an anti-Dog Man message across to Li’l Petey.

Instead, what we perceive as a dog being "mad" is often just their way of expressing discomfort or frustration in the moment. A stock image to show a 'mad' dog. A stock image to show a 'mad' dog.