Because comparing two sub par products and saying “look, greenies are fine” isn’t really proving a point. All you’re doing is bringing up two other products I’d never buy.
Technically ol Roy and alpo have a stamp of approval from Aafco, that doesn’t mean I’ll feed them. Everything in there is edible for a dog, so that makes them an acceptable product?
Those were the two points you made, and neither makes a good case for greenies. There are better products that are better for my dog, that have ingredients I approve of, and aren’t any brand you listed
