Sam, People should show consideration to the other visitors when they find themselves interested in bringing dogs into any of the pools. I have seen a number of times that people have encouraged others to bring thier dogs in but in most cases there is usually someone who really doesn't like it. Of course there are also people who wouldn't consider a sign or the objections of others in the pools in regards to bringing thier dogs in. I think most people would see the idea of a permanent sign afixed in sight of the pools as to much an artificial intrusion on the beauty of the scene. Since dogs are legal to have at the springs the best course for visitors being affected by inconsiderate dog owners is to get together and express thier dissatisfaction to these owners. Hopefully they will appreciate what they are being told without some kind of argument or fight ensueing.