I used to ride a 20 something year old arab/app cross in lessons. His favorite game was called "I will not pick up my feet". You could pinch, poke, lean, jab - you name it and he just stood there. Made it really hard when you were on a time schedule for a lesson.
So, I resorted to bribes. For each foot, a piece of carrot. Eventually, we got to a piece of carrot after all 4 feet.
Spring forward several months after not riding him. There I am, picking his feet just like always and he refuses to give me the third foot. I just look at him as if to say, "really?". So I start brushing and let him think about it. Went back the offending foot, and he gave it like a charm. And he got his treat after the 4th. Guess he remembered. LOL
Still miss that stubborn old coot!