It was almost 100 here today and I think one of my hens may have heat stroke.she is laying under the water bucket( mine hang) and was pretty much lifeless.she has no apparent injures and there was plenty of water.everyone else is hot but ok.I sprayed her down with the hose.she can walk,but it seemed hard so I left her alone hoping not to stress her more.her mother died year before last in a stretch of 3 days of 107 degree heat.the birds are out of the sun in coops off the ground.can heat stroke be hereditary?