It is not about the water itself, but about the quantity that is risky. I say risky, because not every dog that drink copious amounts of water will bloat. When performing or exercising, I prefer a 10 minute cool down before allowing a drink. I count to twenty, remove the dog from the water and then if I am done with the work, I reintroduce water 20-30 minutes after finishing. If hiking, I just let them drink. They usually lie in the water while they drink. I never had a bloat issue on a trail, but I also never hike or work dogs on a full belly.