I had adopted Lady 1 year ago, from a very good Animal Shelter here in Colorado. I notice when I adopted her she had a tattoo on the inside of her right thigh. I have been told by my vet, by the way she acts, she has been trained as a companion dog. He also told me that since the tattoo was not in the proper place (inside the ear) that the tattoo is to mark her for her training as a companion dog. Could anybody tell me if this is true or a bogus myth. I have been trying to find answers for the last year. Any help would be greatly appriciated.