I hear ya. They weren't laying yet so I'm not sure. My white leghorn just started laying, but they are all 20 weeks old (and several are doing the squat thing which tells me they're ready to lay!). I'm trying to be patient but it's hard, I'm so excited. I will have to recap next summer and see how the leghorns faired compared to the rest as far as laying through the heat goes.Panting is how they cool themselves, just like dogs. Did they still lay eggs when it was so hot, or were they so miserable that they quit laying, I guess is my question.