It has to meet this 2 requirements:

• It's produced from the waste of another product.
• Its ready to eat.

I think sausages and ham meet this requirement since they are made from trimmings, maybe some cereal brands but i dont know. In México, if you buy a liter of cooked beans made by a small store, it is very likely made from broken beans and bad beans left when grain is processed so i think that also meets the requirements.

Also being honest, probably chicken nuggets are made with trimmings, in spain theyre even called "croquetas" which its the same word for dog and cat food.

Honestly I sometimes just heat up a can of beans and put it in a bowl and think to myself "Mmmm, bachelor chow"

Dry food: military ration crackers

Wet food: huel/soylent

British edition: tesco meal deal

Soylent?

In terms of being widely available, ready to eat or easy to prepare, having a common form with slight variations, and high popularity, then I would say Pizza.

SPAM, or any other canned meat slurry

Cocoa Puffs

Hard tac and canned tuna

Requires no cooking, shelf stable, and can safely provide a complete diet? Some type of fortified bread is probably as close as you're going to get there.

canned corn beef hash is dog food, IMO

Plain cheerios. Tasteless, fortified with vitamins, and just lacking in protein

if you live in a country where pet food has to be safe for humans then theres no need to equivilate. deep fry optional cw: i assume eggs and meat of some sort, legally.

A combination of Totinos, metamucil, and a multivitamin

Peanut butter?

Kitten/Puppy:

• nuggies

Adult:

• bagged popcorn

Senior:

• multivitamins + fiber supplements

Beef Stroganoff

lunchables

McDonald's

Mazuri Primate LS Biscuit. Available in banana or cinnamon.

dog/cat food