Originally posted by Sokaku:

Make sure you have the area well walled off with the log walls before defeating Elkthyr. I did a similar thing figuring out how to breed boars, though had no way to slaughter them til I found out about the butcher knife. Beat the big elk (By then I had fully upgraded leather and decent archery skill) However was completely unprepared for my first "Forest Moves" event, had never even read about it.. It didn't go well for me or my Boar farm. :(

You can cull tame boars before you have tin by turning PVP on and attacking the boars you want to cull. Once you have gathered all the boar meat or leather scraps you need turn PVP back off so that you don't accidentally kill boars that you want to keep for breeding.