Dogs do not seak out a hydrant to pee on as we humans seek out a washroom. It is because people generally walk their dogs on a side walk. Since fire hydrants are usually next to the sidewalk, it is the closest upright object availible to them. Once one dog pees on something, all the other dogs have to pee on it to. This is their way of saying, this is my walking path, not yours. So all you dog owners don't let your dog pee on a hydrant! A firefighter might have to use it to put out a fire! Would you want to touch that? Train your dog to pee on telephone poles, that's what they are for!