Just a little tip here about what worked for us with the "sit" command. Hubby took two of our previous dogs to obedience school. First they were taught to heel, using a choker ( ) collar (I know some people on these boards don't care for them, but it was mandatory at this school) to give a very quick correction. In connection with learning to heel they were then taught to sit when their human stopped walking by a quick correction and at the same time pushing their little bottoms down and clearly saying "sit." The object was that they are to heel when walking and when the human stops walking they go into a "sit." I think this makes the whole "sit" command thing easier.

From the sit command comes the "down" command and then the "stay" command. They all seem to go in a progressive order. Hubby was told to practice 10-15 minutes a day every day. You could clearly see the doggies who were "doing their homework" by the way they responded in class. Repetition is the key. Again, each dog has his or her own personality so that also plays a part. There was one little sweetie who would "sprinkle" in class from being a little nervous. Lots of luck with Fritz. Keep us posted on his progress and patience is the key!