This is good to hear. I don't tend to baby my chickens anyway, since we were never able to get electricity out to my old coop in Maine. All I was able to do was shovel the snow out of their pen and put bag balm on their frostbitten combs.
What sort of things can I do to help them acclimate to the heat? Or should I just let them be?
Thanks!
Air flow is the biggest thing. We have pens that are all open air and some that are coops, but even the coops have very large windows, and the roof of the coops is not closed in, so that air can come in under the eaves and flow out the top to help with heat buildup inside the coop. And one of our shorter coops actually has a solar powered fan to help blow hot air out of the coop.
Shade is a big deal. If you don't have it, then make it. Our pens have double layers of shade cloth on them over the wire runs, they are situated with their solid back/side walls to the west and north so that they provide shade during the hottest part of the afternoon when the sun is over in the southwest, and in winter it offers wind protection from the cold north/west winds. then the shade cloth covers the top and all sides, but we leave a 2 ft gap between the ground and the bottom of the shade cloth for air flow, otherwise it gets too hot in the run. For our one free range flock, we make sure that they have access to shade during the various times of the day.
The worst problem with heat stressed birds is always when it first gets hot after winter. We use hanging buckets with nipples in them for water, but when it is hot (or below 32* all day long and the nipples freeze), then they get a big rubber tub of water that they can wade in to help keep cool. Some of them will even wallow like a duck in the water if they are hot.
We also use frozen soda bottles to help with the heat, but once they have acclimated for the summer, I try not to use ice bottles unless the temp is around 105* or higher, because we really want them to be able to withstand normal summer temps which are usually around 100* at least. But when we first start seeing the hot weather, April/May timeframe is usually when the 90* starts, then I watch them closely and I will give them ice bottles in their water and in their runs to lay against, if they are looking too heat stressed below 100*.
But generally by June, they are acclimated enough to not require ice bottles in the runs unless the temp is over 100*, and I try to avoid giving them the ice bottles unless it is 105* if they are doing ok - just because there is no guarantee of electricity to freeze ice bottles. I use foil bubble wrap insulation around the water buckets, and that helps to keep the water cooler in summer/warmer in winter. Often, just throwing their old water onto the ground in their run will be enough for them to wallow in the puddle to stay cool, in addition to their wading pools, unless the wind is completely still, or it is 105* +.
We also freeze fruit/melons to give to them to help them cool off when it is over 100*.
One thing that we have, that my friend in Maine has not mentioned that y'all have, is that we have HUGE temperature swings in the same 8-24 hour time frame. This is generally in late Autumn through early Spring. We can go from 90* in the afternoon, to freezing or below by the next morning. It makes taking care of outside animals a lot more difficult. And this can go on for the entire season, every few days, with temps going back and forth from hot to cold. The swings to cold don't seem to bother our chickens as much as the being cold for a week and then suddenly being hot. For times that it is hot and then goes to cold, we will throw out sunflower seeds/scratch grains to help them have more energy for keeping themselves warm as the temp is shifting to the cold side. When it shifts to the hot side, we just have to watch them and see how they are, change water more frequently to get them cooler water to drink. This time of year is a pain because we still have their tarps on the north/west side of their wire runs, but we are having days of 80* and the runs can get pretty warm if the sun is shining, so sometimes I have to take the tarps down, then put them back up a few days later if we have strong cold winds coming. It can get crazy sometimes.
You'll figure out a routine, just watch the birds you have and you can tell how much heat stress they can take at what time