Hiya I live in England UK, it seems a lot of cavvies on here are in the states and other far away places from me here. Ive got 4 guinea's 2 x19 week old girls and 2 babies x 4 weeks old. Ive noticed that over in other countries you use totally different bedding than we do here. I use Hay lots of HAY which they love and is very good for them its comfortable, a vital roughage, and keeps their continuously growing teeth in trim. and you can use newspaper on the floor of the cage it does no HARM to guinea's as they like to have a chew the same as they love to play and chew the inside cardboard of tiolet rolls. and hay(lots and lots of it on the top makes alovely warm bedding and with all the additional benefits as well where as ive seen on here people use totally different beddingtHE BOOK BY PETER GURNEY IS VERY GOODHETRAINEDWITHCAMBRIDCAVYTRUSCAVYTRUST.