I have 2 water's and freeze them half way then when one is spent I trade it for the other, clean/refill/refreeze etc. yet they stay hot it seems. I have provided a crazy amount of shade as well as taking fans out there to circulate air better on stale days. I've tried giving them cold fruits, yogurt and whatnot and they either wolf it down or look at me like I'm stupid for giving it to them..lol I don't want them to over heat. It is cooling off at night now which is good but mid day it still gets up to high 80s..