A change in friendly fire settings means traditional weapons won't hurt your animal companions.
Valʜᴇim's ʙᴜᴛcʜᴇr knɪꜰe hᴀs a sᴘᴇᴄɪᴀʟ purᴘᴏsᴇ. It wᴀs ᴀᴅᴅed ɪɴ tʜᴇ Heᴀʀᴛh ᴀɴd Hoᴍᴇ ᴜᴘdᴀᴛe specɪꜰicᴀʟʟy ꜰᴏʀ ᴋɪʟʟɪɴg tʜᴇ ᴀɴimals ᴡʜᴏ ʜᴀᴠᴇ fᴀʟʟen ɪɴ ʟᴏᴠᴇ wɪᴛh ʏᴏᴜ. I ᴋɴᴏᴡ thᴀᴛ sᴏunds terrible, ʙᴜᴛ pʟᴀʏers taᴍᴇ ᴀɴd fᴀʀᴍ boars, wolves, ᴀɴd lox ɴᴏt ᴊᴜsᴛ ꜰᴏʀ compᴀɴiᴏɴsʜɪᴘ ʙᴜᴛ ꜰᴏʀ resᴏᴜʀces. I'm ɴᴏt sᴀʏɪɴg ᴡᴇ ᴅᴏn't ʟᴏᴠᴇ ᴏᴜʀ pets, ʙᴜᴛ ᴡᴇ ᴀʟsᴏ ʟᴏᴠᴇ ᴛᴏ ᴛᴜʀɴ tʜᴇm ɪɴᴛᴏ ꜰᴏᴏᴅ, cʟᴏᴛhɪɴg, ᴀɴd craftɪɴg compᴏɴents, especiᴀʟʟy sɪɴce tʜᴇ ᴜᴘdᴀᴛe ᴀᴅᴅed ᴍᴏʀᴇ ᴜses ꜰᴏʀ tʜᴇm.
It used to be that you could kill tamed animals with any old weapon, but that led to a lot of accidental animal deaths during fights with monsters. The Hearth and Home update requires you to turn friendly fire on or your weapons will do zero damage to tamed creatures. And since most people play with friendly fire off, you might want to craft a butcher knife for when it's time to harvest your flock.Valheim butcher knife: How to make one
The butcher knife recipe is pretty simple:2 wood4 tinA forge
If you've been away from the game for a while, you can find tin deposits in the Black Forest biome along riverbanks or the edge of lakes or the ocean. Dig them up with pickaxe and and smelt it into tin ingots in your furnace. And we've got instructions on how to craft and upgrade a Valheim forge here.
With your new butcher knife it doesn't matter if friendly fire is off or on, you can kill your tamed creatures and make stuff out of 'em. Harsh, yes. But useful and quite tasty.