I use cotton yarn to tie my NIC panels together....I'm really careful as to not leave the pieces lying around where my bunnies can get a hold of them, and I cut them really short on the panels, but I know my buns have tasted them a time or two...as for them being safe, I'm not sure. Probably as long as their not ingested or something.
you'd have to be super careful that the buns didn't ingest it. it couldwrap around their insides and that would be very sad:tears2:. hmmm, i'm wondering about the dyes used to color it.................