Not many, probably less than 40, but check this; the wife wanted to leave a big bowl of candy out so no one would ring the doorbell and disturb the dogs. I discouraged that, saying the first kids would just take all the candy and probably the bowl too. She didn't care, she just wanted to do her part while letting the dogs relax. So we did that. I went out a couple times and the candy levels went down but there was still plenty in there. Then I went out to retrieve the bowl at 9pm and there were still 12 or so pieces in the bowl. Perhaps my opinion of humanity was lower than warranted