I always pack along two big squirt-top bottles of water in my upland-hunting vest. Sometimes I take a pull off one, but they're primarily there for the dog. I also try to take advantage of any clean, cool streams or ponds I come across, and give Kona time to drink, swim or just lay around in the shallows. If he is reluctant to do so, I'll just take a break and wait him out. Usually after a couple of minutes, a dog will fill his needs when he understands that nothing else is going to happen. If that doesn't work, I'll often just soak him down by hand anyway.