The definition and abbreviation for Potentially Hazardous Food (Time/Temperature Control for Safety Food) or PHF/TCS should be modified to drop the reference to potentially hazardous food and PHF.
Yes, as a treat apples are fine for chickens. Some will say it is best not to feed them too many apples as the seed of an apple has a small amount of arsenic in it. I have an orchard on my property and in the fall, the chickens run there first thing in the morning. Never had a chicken drop dead under an apple tree.
The birds that eat insects, meat, seeds as well as fruit are placed in the category of omnivorous birds. Ducks, blue jays, woodpeckers, emu, crows and quails are examples of birds that eat worms, insects, insect larvae, meat, fruits and seeds.Certain types of finches feed on berries, seeds as well as insects.any birds enjoy eating fruits, so you could also keep sliced fruits. For cockatiels, you can keep a pellet based diet that includes fruits, vegetables and seeds. Parrots, channel billed cuckoos, fig birds, toucan, orioles, bowerbirds, and certain types of woodpeckers and doves enjoy having fruits.