I have a draft X that was started by a pro at 4 years. He was a bad pawer and spent many hours tied to a gentle tree with another youngster that liked to paw. Trainer would walk away saying “First one to dig to China, wins”. This largely erased the behavior EXCEPT at feeding time when he would try to hurry me along by pawing. It took about three days to stop this absolutely. On the day of reckoning, I was approaching the barn as usual and talking to the horses when Mr Rocket Scientist pawed. I turned around and went back to the house. Five minutes later the same scenario. After about 6 or 7 repetitions of this behavior, the gelding and mare had a conference (mare is very, very smart). Next time I could see him waiting for me to get closer before raising his dainty #5 and bangilng the metal fence. That was it for that day, next time he didn’t paw at all and both horses got fed.
There were relapses in the following days but one experience of not getting fed immediately was usually enough to get him standing like a statue. Now he is a few years older and I can’t remember when he last pawed for any reason.
This horse was really telling me to hurry up and feed him, i.e. he was trying to train me. Hate to admit it but for a short time he did. Horses are very persistent and often wear out our patience and we give up. This only reinforces the horses idea that he is training us.
At 3 years, this horse can easily be trained to not paw, big friendly tree with nice dirt so he doesn’t injure himself and leave him there until he STOPS. When you approach if he paws, leave and don’t quit the exercise untilhe stands when you approach. Do this when you have hours to spare. at this point the horse has nothing to do but to continue to try what has worked in the past and that is to train you to give him attention by pawing. Good Luck.