Recently I purchased cooling collars for my dogs to help with the heat of these summer days. One is like a gel pack you but into the freezer then slip it inside the collar. The other is a lined pocket that's on the inside of the collar that you fill with ice cubes. I think they both work great. The dogs don't seem to mind wearing the collars, infact when it's extremely hot I think they enjoy it. Have you tried them? What do you and your dog think of them?