Well, thanks all.

I'm most inclined towards Chookie's idea, but unfortunately the rotten
bloody local cats (thanks to their inconsiderate and unthinking bloody
owners) (don't get me started!) would make short work of any pet chooks.

I think I'll just leave them, and do a cull when I eventually spread the
compost around.

(Interestingly, I fed a heap to the maggies some time ago - they ate one
or two, but wouldn't take any more. They left me with half a tin of the
wriggling pver-sized maggots. Too many to use a Blundstone on.
Eventually bagged them and binned them. Yuk.)

Mark.