Thread: quick question

well today I took my dog for possums and just parked of the road walked 50m and stumbled onto a dead pig in the creak. about 50lb, had a quick look over and no obvious dog marks or bullet holes, hadn't been dead long maybe a few days but the way it was lieing down kinda looked liked it had gone to get a drink and just sat down and carked it. any ideas what might cause this to happen? no human sign or dog sign around and the pig looked healthy