Anyone ever heard of this? It means 'Please give my dog some space its wary of other dogs' for dogs who are just grumpy, on heat, being trained etc I think its an excellent idea - I have a grumpy bull mastiff who i walk with my 5 month DS in a harness and I hope the word gets around as I find it difficult to deal with Dc and Grumpy dog if another dog comes up to us! www.yellowdog.com