Shadow and Whisper know their names, but that's about it. I'll call one to come to me in another room and they generally do come in. Callie has no idea what her name is, or the word "no", or "get down", but I think she does know when I want to give her some treats.... We usually have to walk over to them if they are being naughty to make them stop whatever they are doing...which is really irritating at 4 AM.