Chickens, turkeys, ducks, geese, rabbits, sheep, goats, pigs, and cattle. I suspect the guineas were collecting bugs drawn to the sweetness. Dogs like pumpkin/winter squash once cooked. Rabbits do it in a funny way through the winter, they scrape the “zest” layer of the outer skin off and then once they find which of the types you have are best they begin to eat their way in.
Apples are another near universal food. Sheep should only have small snacks, not free feeding. The fowl know they want it but dont know how to start it and some dont have the tools so its necessary to rock your foot on those to crack them first otherwise they lay around until they start to rot and then the chickens may get around to it.
Horses and donkeys can supposedly have both too but Ive never owned those and never tried giving them pumpkins.
If you plant enough to intentionally us as feed come winter remember that pumpkins attract all kinds of wildlife to eat them also. Bringing in free meat sources may be nice when the weather gets colder again but at the same time that brings in the predators that eat those things. (Foxes stand on both sides of that.)
Your warning is b timely. I just literally lost my last beloved chicken, Laura, only two days ago to a bobcat who scaled the tall fence to the pen. I suspect they come in from being attracted to our numerous cookouts and BBQ, and my leaving out scraps for bunnies. Ugh.