Luckily for you, your small pet, like a gerbil or guinea pig, is a fastidious groomer by instinct, so there’s little for you to do.
Small animals don’t really need to be bathed unless there’s some sort of extenuating circumstances, but they can use a nail trim on occasion. Use small human nail clippers to trim the tips of your small animal’s nails. Don’t take too much off, as they need their nails for traction, digging and burrowing.
Check your small pets’ teeth for signs of even wear, and make sure they have something available in their cage to chew on. Ferrets actually require a daily brushing of teeth, so make sure you’re committed to doing that before taking one into your home.
Feel free to brush your small pet or clean his ears with small cotton swabs and a drop of baby oil.