There are two ceramic bulbs in the pen with Emily and June, one over where they sleep and one over the main floor area. There are two in Hector's, one hooked to the fence divider up high between that pen and the bantams' pen pointed sort of toward Hector (he insists on sleeping up there, not on the roost and his leg is always hurting him) and one centered over the big main roost. Athena would have to sit herself directly under it to feel any heat. I can't add much more wattage (there are others with Atlas and with Snow, etc) or I may melt my extension cord-that happened once and we replaced it with a new one. It is plugged into the outlet on the house porch and runs all the lights and water defrosters in the barn. The bantams have a 250W since they are so tiny and so old. At least the barn keeps them out of the wind so I hope that is enough for poor Athena.
Maddie spends some time with Hector, but she insists on sleeping in Emily's old pen so I have one ceramic bulb in there over the roost. Almost all her neck feathers are gone from Jill yanking them out. Jill the Pill, she is a mean witch, that one. It's generally at least 10-15* warmer in the barn than outside. When I think of poor chickens huddled out in dog kennel-type pens with no true shelter, it makes me so angry and also, makes me wish mine knew how good they have it. But, they deserve it and most are so old, have to make concessions for the elderly.