Pshhhh, I won't bother in future ...

My pigs used to have a roll of willow sticks, like this:
(broken link removed)
But they dismantled it and I've had a load of single sticks in my cupboard for ages now.
So I decided to make use of them, since they love willow so much, and spent ages propping them up against the side of the cage to make a kind of tunnel against the wall. As soon as I was finished, Elliot ran inside and headbutted all the way along, sending the sticks flying all over the cage. Now he's just sat happily nibbling at them, obviously very pleased with himself.