The players in my group often try and eat monsters/creatures they have killed. This is not an issue with things such as wild boars or even owlbears, but last session they ran out of rations in the wilderness and chopped up a basilisk they had just killed. Fresh basilisk blood has certain unique properties such as returning a creature from stone to flesh if applied soon after the basilisk's death. Would it be edible? They also have xill eggs? Are xill eggs edible? Or would they get diarrhea? I usually use common sense as a DM but the basilisk steaks got me thinking.
I've actually got a PFS character that specializes in this. Since he's a good guy, he tries not to eat sentient things. Because eating sentient things is generally considered wrong by society...unless it's a dragon I suppose..I dunno.But any knucklehead can cut stuff up to eat, but a high Survival to be able to cut out and around the bad bits would be useful. Maybe a knowledge [whatever your trying to cut up] to know about said bad bits you probably shouldn't be eating?
Just my random thoughts on this.