Originally posted by ShaftAlmighty:

I have a pen(wood fencing) and a single piggie in it. I threw some shrooms in it and left the area. There is no fire, i moved my kiln and smelter, yet this stupid piggie is still aggressive. I've only ever domesticated boar one other time.

It worked once, didn't work on a second one, I couldn't say why. A third one, it was working, then the @#$! swamp creatures came in and killed it.