You brang up some interesting points, especially about her being in heat.. I'm not really sure, she seems to have been kicking out for about 2 weeks. She has had a foal before.
The thing is when I'm riding her, and I ask her to move forward (she ignores) so I ask firmer, etc, If I have to use the whip, her ears go back, the tail swishes and she kicks out - I'm not sure what to do when she kicks out? It worries me when she does only because after she has been kicking whilst I've been riding, she becomes very cranky on the ground. She becomes impatient and stamps her front feet - I try to put her rug on as quickly as possible but she is just so pushy!
I don't think she has ever really been ridden with a crop before - she seems to be surprised when I use it, perhaps you're right and she is confused as to what it means.
I understand about not letting her get away with things, however when she does kick out, what do I do? Should I give her a smack again? I once rode a horse who would jump up and pigroot evertime I used the whip - the owner told me to keep smacking, the horse went besurk, however after he had finished jumping around he calmed down alot and realised who was boss and he went quite well.
The owner of the horse spoils her a bit - she gets cuddles and kisses and lots of praise everytime she does something, I know its important to praise although I think she over-praises her. Good behaviour should be expected. Maybe this is why she has become so pushy.