Hi there Tara, if it's the stuff I'm thinking about I would say it's totally safe, though a bit messy to clean,
I changed from fleece to vet bed a few months ago,
I was so impressed I bought a 10 metre roll direct from the manufacturer to do all the cage is in my sanctuary,
the initial cost of that bed may be a bit high, but it more than pays for itself in comfort for piggies/ease of cleaning/amazingly fast drying time,and hygienic,!!! it wicks all the wee to the newspaper I put under it, leaving the surface the pigs walk and sleep on totally dry , best move I ever made!!!!