Ok, my husband and his family have been raising pigs for years. And I have raised pigs a few times in the past. Well with our new batch of piglets (now about 4 months old) I was throwing new bedding to them, and he tells me not to put too much down, because they will get to hot and suffocate. I never heard of this before. As my grandfather would put a heater in the pig barn to keep any stray piglets warm. I looked at him like he was crazy. I found it rather funny. I think it is his family's folklore coming out. Have you ever heard of anything like this??