To teach it you can do it a few ways

 To teach it you can do it a few ways. You catch him moving to sit and you then say SIT and praise him with a treat. You have named an action he is already doing. You can also have him in front of you tell him to sit and push his rump into the sit position. Then praise him with a treat just as if he has done it by himself. To teach down you can do it the same way as sitting with catching him laying down and say Down and treat and praise. You can also gently tug on his collar and help him move to the right position. You should NEVER tug hard on his collar. I'm not talking about forcing him in a physical contest. You can also have him in the sit position and hold a treat in front of his nose and guide the treat down to the floor til he naturally lies down to sniff it. Say Down, give treats and praise.

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