• If your rottie lifts his front feet off the ground, you are holding the treat too high. When your rottie lifts his head and shoulders to get the treat, his bottom should go down.
• As soon as your rottie is in the sit position, praise him by saying "Sit. Good boy, sit." Hug him and give him a treat.
• If you need to, gently touch your rottie's back give him a signal that you want him to sit.
Practice this many times. It may take 10 times before your rottie understands! When you think he knows the word "Sit", try it without the treat. If he doesn't sit, don't say anything. Just try it with a treat again. Praise him whenever he does what he is supposed to do.
TIP:
When you give the command to "Sit", say it only once. Don't repeat it because your dog will learn that he doesn't have to sit the first time. If he doesn't sit the first time, just go back to practicing with the treat again. Don't forget to say "good boy" whenever he is working hard!