Article: A frozen variety of your hamster's favorite treat is a great way to cool him down on a hot day. Be careful to stick to treats that are safe for your hamster. Consider freezing: Barley Cashews Flaxseeds Millet Oats Peanuts Pumpkin seeds Sesame seeds Cooked potato Fill a water bottle (or an empty soda bottle) about halfway with water. Wait until it freezes solid. Then, wrap it in a towel or cloth and place it in your hamster's cage. Make sure you wrap the bottle. The frozen bottle can hurt your hamster's skin. A good tip is to freeze the bottle on its side. That way, when you place it in the cage, the hamster has more to lay against. You can also use a frozen ice pack. Hamsters like to bathe in bath sand. You can treat your hamster to a cool bath by freezing his bath sand. Try taking a cup of sand and placing it in a zip-lock bag. Put the bag in the freezer for a few hours, remove the sand from the bag, and place it in the hamster's cage. If you have a ceramic house in your hamster's cage, you can freeze it for a few hours to create a cold habitat. Ceramic holds temperature well and can provide a cool haven for an overheated hamster. Alternatively, you can use a frozen ceramic tile or marble square in his cage. Dampen a towel and freeze it for a few hours. Drape it around the outside of the hamster's cage, wrapping it around the bottom of the cage. This will create a cold barrier that your hamster can lay against. Make sure you do not block the airflow from your hamster's cage with the towel.
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Give frozen treats. Provide a frozen water bottle. Freeze bath sand. Freeze his ceramic housing. Drape a frozen towel over or around the cage.