I got one of these for mine, within a day it had been reduced to bits of willow and hay everywhere...definitely food orientated!
https://www.thehayexperts.co.uk/Toys+%2526+Fun+Things.6/Weave-a-Ball.292.html
This is my buns favourite toy...
http://www.amazon.co.uk/East-Coast-...YM/ref=sr_1_21?ie=UTF8&qid=1307285827&sr=8-21
I got it on ebay for 50p.
Jura playing by Niseag, on Flickr