A very good friend of mine sent me this fabulous gift, a Bullyland Cork Bear. From what I've read on my friend's site, Bullyland made them in this material because they were almost impossible to break, being good for rough play from Children. However this material proved to be damaging to the moulds, meaning the idea was dropped and so there are some models out there like this one, unpainted.
With a Papo bear for scale
I won this little pig on eBay the other day, my little pig colony is growing;)
Schleich Guinea Pig