Is it safe to put sandpaper in a hamster cage get their claws down?

No, it's not safe to put sandpaper in a hamster cage to trim its claws. While emery boards are a safe choice to trim hamster claws, sandpaper can be too harsh and can cause abrasions to the hamster's feet and lead to infection. Using a specifically designed set of pet nail clippers is the safest option for trimming hamster claws and will help keep your pet safe and healthy.