Anything that is carrying a cockatrice corpse, including the player, shows up as a 4 or 5 on warning due to its high threat level.

Gloves that are sufficiently burnt or rotted only protect from touching cockatrice corpses some of the time.

When you have greasy fingers, you can touch and pick up cockatrice corpses safely.

If you wield a c corpse and take any of several actions that normally turns you to stone, it instead rolls a body part to see which part of you touches the corpse. If this part of you is wearing armor, you don’t touch it and so don’t turn to stone. However, it’s impossible to cover yourself completely.

You get petrified when you faint or otherwise fall asleep while wielding a cockatrice corpse.

Eating a cockatrice corpse only petrifies you 85% or so of the time, the rest of the time it “tastes like chicken”.

Throwing a cockatrice corpse into water turns it into a hard floor, or possibly ice, with the corpse buried in the new floor.