The cheapest way to be sure they have enough heat is a light bulb. A plain old 100 watt bulb works, but a "floodlight" that directs the light (and heat) is better. There is no need to go to the extra expense of a "heat lamp". Suspend it so it hangs about 10" above the floor. A cardboard box works well for an enclosure, and I recommend cutting the bottom out. What you want to avoid is getting it too hot under the bulb and risking a fire. Be sure you have the light fixture well secured so it cannot slip or fall. Watch the chicks. When they are at rest, they will huddle under the light if they are cold. They will spread out in a circle at the perimeter of the light if they are comfortable, and will form a very large circle if they are too cool. If yours have feathers they are a week old or older. By about 3 weeks they have pretty well feathered out, and will be pretty independent of external heat sources. A good rule of thumb is 95 degrees for the first week, reducing the temp 5 degrees each week until they are 4 weeks old. Good Luck!(posted 9639 days ago)Brad