My broodmare used to be terrible having her back feet done, would snatch them, stomp them, wrench them, kick you over you name it, she tried it! After she foaled down, I tied her up (to baling twine, although she gives to resistance so could tie her solid too!) and then every day, twice a day, I picked up her feet, and picked them out. If she tried to pull them away, I growled and held firm. If she tried to kick or anything else, I gave her a slap (sounded good, but hurt my hand more than anything ) and she came good within two days. Hers was a dominance issue. She used to walk all over me on the ground, but now she'll walk in her own space, stand quietly for the farrier, and be happy to stand out on the arena on the lunge instead of insisting she has to be in my pocket. It hasn't taken me that long, I just had to show her who the boss is!