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Ever heard of “fillers”? The most obvious and easy filler is water. Take a burger. Take a syringe. Fill the syringe with water. Inject it into the burger. Your burger is now 30% thicker and 30% heavier and it didn’t cost you shit.

There are other FDA approved fillers that are similar. They add no flavor, add no nutrients, but they’re safe to digest so they’re uses to “bulk out” foods. Sawdust comes to mind as one (most shredded cheese contains sawdust).

McDonald’s uses fillers to lower their food cost by 20-30% at the cost of flavor going down by 20-30%
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It's better to cook for your pets, because what they put into pet food is essentially what they put into fast food except it's deemed not fit for human consumption. So it's like you're giving them a burger that's ~50% meat, 50% sawdust, cornmeal, GMOs, and daizu/edamame. Only it's one that's made from what they would typically throw out because it's gone bad or is subpar overall. Would you want your pet to eat that? You wouldnt. Why should they?
