It could be for a few reasons. Maybe the dog is excited or just played too hard and is catching its breath.
For a cartoonish dog wash, you might have the dog running around and getting dirty first. Then, show it being carried to a tub filled with rainbow water and having soap suds flying everywhere. Or maybe have funny little animal helpers passing the soap and towels to the owner.
The dog could be wheezing in the cartoon because it has some sort of respiratory problem or maybe it got scared by something.
Maybe it's out of breath from running or playing too hard.
Maybe it's for adding some comical effect. The wheezing laugh could make the dog's character more unique and funny.
Maybe the dog is having trouble breathing due to physical exertion or an underlying health issue.
You could start by making funny sounds yourself and encouraging your dog to imitate. Use treats as rewards when it shows interest or tries to make similar sounds.
Well, the dog wheezing and coughing in the cartoon could be due to various reasons. Maybe it got into something it shouldn't have, or it's a way for the cartoon to create tension or sympathy for the character. Or perhaps it's just a random event for added entertainment.
It could be a comical and mischievous character, known for its unique laugh.
One possibility is Courage the Cowardly Dog. His laugh sometimes has a wheezy quality to it. But there could be others too, depending on the specific characteristics you have in mind.
It could be for entertainment, making people laugh with the unusual combination of a wheezing and laughing dog. Maybe it's a creative way to stand out and catch people's attention.