I have this same issue also with two little kids! One of the things I love most about having chickens is that between them, our dogs, and the compost pile, we have pretty much zero food waste these days. The items that our chickens get most frequently are wilted vegetables, kale and greens that are starting to get a little slimy, mushy berries, partially eaten apples, cooked rice, that kind of thing. Also meat leftovers/trimmings, salmon skin, etc. I try to rinse off most sauce or butter/oil before serving. You may also want to check the protein levels in your regular feed if you are feeding lots of table scraps. We feed a grower at 19% to give some leeway on feeding what might be lower-protein scraps. Also I try to not skimp on the meat scraps for them. I do try to avoid very processed stuff for them--I'm realizing as I write this, most of that stuff goes to the dogs if needed. I'd hesitate to toss the chickens a piece of pizza, but I only have 6, so a piece of pizza would be a decent chunk of their daily food intake.