I have a couple quick questions about house elves.
If house elves receive conflicting orders from two masters, whose do they follow (e.g. one says clean up the dishes and another says leave the dishes on the table)?
Also, can a house elf kill one of its masters and not hurt itself (e.g. if one master orders a house elf to kill another master, does the house elf then have to punish itself after commiting the deed)?