They are stressed out. Not good. I fill (3/4+ full) plastic gallon bottles with water and make ice. It takes about 3 to 4 days to become a good icy bottle for it to work. When it is too hot I put the bottle on the metal mesh like so, that the place where bunnies rest, do not become wet. Change buttles as soon as there is about 1/3 of ice core still left there in the bottle because it takes about 2 days to freeze up again. So, that bottle goes back to freezer and I take out another iced up gallon and replace it. That gallon that I just put back in the freezer will be ready in 2 days again for use. If ice core is gone it will take up to 4 days to completely freeze up. Unless you have freezer where you can lower temperature to speed up freezing process. I am using my fridge in the kitchen. Durung the summer it is filled with 8 of those jugs because they need to have enough time to be ready for rotation between bottles for bunnies. Always making the bottles are being washed well outside before putting them back into a freezer. I also use sun reflective materials to cover roofs of bunnies cages (well, my live in a condo that i built myself). It is VIVOSUN Highly Reflective Mylar which is heavy and I reuse it each year if it is still reflective. I also bought fans with solar panel (on TEMU) and they move the air around bunnies. In total It all lowers heat by about 20 degrees cooler for bunnies. Try it.
