Corn starch or baking powder can be used to help stop bleeding. I use it on dog claws if they break into the quick. Just make sure they don't peck at the corn starch or baking powder. Not baking soda! Baking powder.
Edit to add - baking powder is also what the local livestock vet had me use on my horse, when she ripped her shoulder wide open, to help stop the bleeding, keep flies out of it, and to hold the spray-on medication on. She healed up amazingly well. We're talking a gash about a foot long, bone deep, and splayed wide open. Now you can't even tell it happened.