I've heard that too about giving dogs ice cold water and bloat. I still give my dog ice to chew on. No one really knows what causes bloat, and some will say a dog can inherit it from one of its parents. IDK I do think though that feeding or giving excessive water to a dog prior to and immediately after the dog has just been through a high level activity (running / jogging, agility, schutzhund) could cause bloat in a dog. I never feed my dog prior to agility class and wait at least an hour after before feeding her, just to be on the safe side. If she's running around outside like a crazy fool playing with the kids, it's the same, no feeding prior to and no sooner than an hour later.