Is there a human equivalent to dog food or cat food?

I think its really cool that a dog or a cat can just live on one type of food all its life. And its healthy for them and everything. They dont really have to worry about eating badly or healthy because Im pretty sure they dont make animal food that isnt healthy and good for them. And I was just wondering if there was like a human kibble food like they feed animals. Not that Id wanna eat it or anything, just basically wondering if it exists. Haha. Does anyone know?