[Lazymeatball]

Eating cat food for a month would have severe health implications as cats diets are primarily proteins. Most dog foods usually have corn or rice as one of the first four ingredients though, and is slightly more compareable to a human diet.

However there are certain brands of canned hippy dogfood like "Wellness" brand which have actual recognizeable vegetables like carrots, green beans, peas, barley and such mixed in that might be able to provide enough nutrients for a human to live off of.

If your friend likes corned beef, I would imagine he could eat fried up canned dog food. And as for the fancy feast, I hope he likes seafood or pate.

He should probably do some research to make sure he isn't missing out on some obscure vitamin that his kidneys need to live.

This is definitely doable. So what enjoyment do you get out of watching him eat dog food everyday? The first few times will be kind of funny, but after that he will probably fail quickly or breeze through it.