I would not trust that they can get all of the water they need from that hampster waterer. You can make a trough style waterer by placing a deep saucer with a heavy cup in the middle so that the water forms a moat around the cup. You really should buy or make them a standard waterer so they will have clean water available but not be able to get wet in the water. If you just give them a dish or bowl of water, they can get wet or drown. You really should get a thermometer. It's so very easy to overheat chicks if you are a newbie and using a heat lamp.