I usually buy the big bales of woodchip/flakes from PAH - cost about £11 a bale - I have 5 guinea pigs and use it as their bedding. However when I used some last week I found it really dusty.....thought it'd be ok cos never had a problem with it before...then noticed the following day one of the girls had a slightly runny eye so completely scrubbed their cage clean and just put shredded newspaper down and loads of fresh hay - eye took a couple of days to clear up and now fine. I'm sure it was down to the dusty flakes. Anyone else find this? I've stopped using their hay because it was soooo dusty it was like a cloud when I opened a bale - and was forever causing eye trouble with the pigs. What do you other pet owners use? Fortunately I usually have plenty of newspaper and always stacks of hay but using woodchip/flakes does help soak up the wee but not at the cost of a poorly pig/vets bills!