It appears sign language can be used with dogs as well as gorillas. Check this video (nb: ad leader). Two deaf Dalmatians, Hogan and Georgia, were taught some 65 signs by owner Connie Bombaci. Methinks this is but a classic use of some gestures to get a dog to do tricks. So what if the gestures happen to be ASL signs?
What are the main differences between ASL and Dog Sign Language?