It's amazing what a little (frozen) water can do! If your pet's confined to a crate on hot days – and I strongly recommend you take care to make sure there's A/C or a fan nearby – try placing a few reusable ice packs under his crate pad.
The simplest way to do this – resealable plastic bags! I buy the largest, gallon-sized freezer bags, fill about 80 percent with water, zip up, and lay flat to freeze! Definitely be careful if your pup's nails aren't filed down – you don't want him to accidentally puncture it and end up in a pool of water. Even though I find the freezer bags to be the sturdiest, if you've got no limit to your budget, there's the official On-Ice Bag ($50 and up) favored to keep show dogs cool when they're not in the ring.
See a couple more tips for icy drinks when you read more.
Many pups – like Samson – love to chase ice cubes (especially PB flavored) around the bowl with their tongues and adding these to water can keep them cool in the heat of the day. If you want to give them more long-lasting coolness, buy an extra stainless-steel water dish. In addition to a normal water bowl, freeze the second bowl 80 percent full of water to make an ice block. Leave both dishes on a pet's placemat so, as the day goes on, they'll have more chilly water to drink.