I would try the ice cubes or dunk her quicley into a bucket of water, it's much faster, if you do separate her into a pen we were told to give her only water, as food keeps the body temp at a more regular temp u want it cooler, if they fail try penning her on a woooden crate or on a raised up dog cage on bricks so the air current gets under her, they worked for my LS and Buff Orpingtons