Some of these are great suggestions, but panting isn't always something that you are going to be able to immediately treat or even need to. Light panting is normal and how they cool themselves. I usually step up the intervention when the panting becomes aggressive and/or is accompanied with wing raising. This is of course accompanied with all of the other strategies I am already deploying proactively such as full shade, cool drinking water, multiple fans, misters, and high water content foods such as watermelon and blueberries. But even with that and semi-normal temps, some of your birds are still going to pant. My blue australorp would pant in 75 degree weather if she could. Checking on them frequently is key to making sure that symptoms aren't abnormal. You will know your girls best through this protocol and will know when to intervene. My step intervention is always to dunk their feet in a shallow container for 10-15 seconds first before I would ever submerge them completely. Being that wet on hot days can have the opposite effect and end up increasing their heat even more as they attempt to dry off. BUT, in some situations, it is absolutely worth doing. But, then be prepared to sit with that gal/gals for quite some time for observation after.
