Allergy
My first impression with this bedding was very very good, so I ordered 3 more bags for my hamstery. Some weeks after, I noticed that a Syrian hamster was having skin issues. At some point, he was losing hair very very fast, so I rushed him to the vet. After mites and fungus tests which came out negative, I decided to use hemp as I always used and he started to recover all his hair again, so it was a pretty bad allergic reaction.
Maybe for other kind or rodent it's suitable, but for Syrian hamsters I think it's a bit dangerous.