You can use a ceramic or marble tile in the cage to give your chin a place to sit or to place hay on. These are available at any home improvement store. Chin Chillers are available at pet stores and online and these are a piece of marble tile cut in half. These tiles stay cool so they serve the purpose of keeping your chin cool should he become warm. If you place marble in the refrigerator and then place it in your chin's cage it will stay cool for a long time. This is good to have if you should lose power in the summer as it gives your chin a place to cool off.