He is absolutely going to removed and squish that leech in a panic, and they will exit with the container is a rush.

Is there enough blood in the container to do a sniffy sniff? Unless it's from someone he fed on before which probably isn't the case here he can't identify who it belongs to off the bat, but if someone gave him a sample to compare he would be able to. He can likely tell if it's Draconae or human or vampire. Only other thing he could detect right away is if there are any especially weird impurities, like someone intentionally altering their blood or it's especially cursed in some way.