I found this...

COOL!! Where do you get this Kong? I want to get some. We've been going through toys and bones like crazy. That looks like a great treat!

Now, what if they can't get all of the food out in one day? Do you wash it out, does it go bad?

Azz, I agree with you on the microwave. Even though I have one, I use it sparingly. I think it could have bad long term effects, and it hasn't really been used long enough IMO for conclusive long term studies to have been done. Radiation? Hmmm....

www.kongcompany.com i think Babs
Yes probably a good idea to clean it out if they dont finish it - but they probably will!

yes microwaves bad - radiation bad!

my mum put my hamster cage next to the microwave - she used the microwave a lot - one stiff hamster with his teeny tiny legs up in the air. :smt022

Awwwwwwww poor hamster!