My plants during the day have been wilting, but its the whole plant, not just a few leaves. In the mornings they're fine, they wilt in the heat and then recover again at night. I would check to see if your chickens did damage.

I'd suspect squash vine borer...look for holes around the base with yellowish dust/paste around it. If you slit the stem and move up, you should find a nasty little grub. If you do have the borer, remove it, mound some soil around the nodes to encourage rooting and hope for the best

When it gets really hot out, all of my squash, regardless of how well watered, go limp. Sometimes all the leaves, sometimes most, depending on just how hot it is, and by evening, they're fine again. If they perked back up, it was probably just that they were losing more water than they could take up, which resulted in temporary limpness.

I think that it's more than likely an evapotranspiration issue. I experience this in our hot southern Nevada desert environment.

Greg
Nevada

Here is a link that might be useful: Evapotranspiration

Thanks Everyone! It has been VERY hot here, though not dry. So far this plant seems to have bounced back, but I'll keep an eye on it, and look for vine borer evidence as well.