My ferret ate some foam?

I have 2 ferrets but one of them my girl who is like 4 months loves to chew on things and yesterday she completely chewed of a piece of her bed. which is a soccer ball made out of cloth and under cloth is foam do u think any thing can happen to her ? her bed look like this http://www.ferret.com/item/marshall-fleece-lookout-for-ferrets/