When I went to check up on my Guinea pigs I noticed a white liquid on the 2nd floor. I have read up on Google a bit and all I really got was that guinea pigs use it to clean themselves. But I don't want to take any chances the only thing I have done different today was when cleaning them out the pet shop had no hay left in stock so I got straw instead I will be going back tomorrow to buy hay. I can supply pictures of the liquid if needed.