Amazon.com : Keten Chicken Coop Heater, 100/200 Watts Radiant Heat Energy Efficient Design, 3 Ways to Use, Safer Than Brooder Lamps Heater with Digital Display and 5 Timing Setting(16.7'' X 12.2'') :
Sweeter Heater Coop & Brooder Heater (4 sizes) - My Pet Chicken
MQ Chicken Coop Heater, 140W Heat Plate for Chicks, Cats, Dogs, Rabbits, Compact Panel Heater with Thermometer Sticker for Pet House and Under Desk
PETNF Chicken Coop Heater 140 Watts Radiant Heat Chicken Heater Energy Efficient Design Safer Than Brooder Lamps Heater for Chicken Coop, Heating Wire UL-Compliant Two Ways to Use, 11.81''x15.74'' - Walmart.com
TURBRO Neighborhood Chicken Coop Heater, 200 Watts Aluminum Radiant Heat Pet Warmer, Lightweight Flat Panel Heater - Wall-mounted and Stand Up
Egg incubators – PetNF
Amazon.com : H&G lifestyles Chicken Coop Heater Radiant Heat Warmer Cozy Chicken Coop for Winter Energy Efficient Design Safer Than Brooder Lamps 120W : Patio, Lawn & Garden