Apparently some birds won't eat pumpkin, but I've yet to have a bird that wouldn't scarf up any sort of squash/pumpkin they could get if I chopped them up for them.
My girls love it. Plus if there is anything left the next day I put water in it and watch the ducks go to town. They love the "pumpkin juice" as I call it.
Mine enjoy them every year! If it is a carved pumpkin I just put it in as is, soon there will be nothing left. I cut a whole pumpkin in halves or quarters, it too disappears quickly. I have also read that the seeds act as a dewormer.