Nutritional alternatives to mitigate heat stress

Thanks for the good discussion. I suggest also lowering the antinutritional and allergenics by changing part of the protein source Soybean meal for SPC Soybean Protein Concentrate. This will challenge the gut development less and also increase the whole feed digestibility.
Currently, when the Microbiota is becoming in evidence, modulating its patterns to better diversity and consequently higher performance, seems to be a proper strategy.

For birds laying in battery cages the best approach is to decongest number of birds per cell. From 4 or 5 to 2. So that they can have space to flap their wings. The hot period is about 8 weeks. Then have Holden pens to drop the birds outside the battery cages in deep litters. Try to program the birds to start laying two weeks before the end of heat zones. So that they can peak just immediately after the hot period. Then you can reduce mortality of heat and laying stress and have prolonged periods of laying before another heat period. Having water refrigeration facilities to drop the temperature of their water to 10 Deg centigrade will have strong cooling effect on the layers. The nutritional aids are betaine, Vitamin C, Vitamin E goes a long way. For Broilers please in open housing avoid production during heat period or increase their spacing as much as possible. Broilers die a lot even in deep litters. Above all use radiant heat reflectors on the roof of the buildings.