Bedding for hamsters, rabbits, guinea pigs, mice and rats. Keeping your small pets warm and cosy at night is very important. As well as providing warmth for your small pets, it can also be absorbent which makes cleaning easier for you. For Hamsters do not use bedding that is synthetic as this could harm your hamster if he ate it and might block his cheek pouches, food pipe or gut. For rats untreated, un-threshed straw should not be used as it can scratch your pet. It is also recommended that you provide bedding that is dust extracted, as this reduces irritation to the eyes, nose and respiratory system.