Usually at feed times is when she is the most aggressive, which is understandable as she is very possessive about her food.
But she will also try and put people in there place if strangers are walking through her paddock, she will walk up to them acting all sweet and innocent, then flick her ears back and then out come the teeth. If I'm there, I can usually catch her before she connects by growling, she will then quickly dart away out of reach and pretend that nothing happened
or she will come at you a lot worse!!
She knows she is doing something wrong but can't seem to get in into her head that if she didn't do it, then I wouldn't get grumpy.
It's very hard to get people to leave her alone as she is a pretty pony and they all seem to want to pat the pretty pony, not the old black horse who is so much more safer!!
As I mentioned before, she is getting slightly better, so I am hoping that she will grow out of the worst of it, I'm not expecting a complete turn around but trusting her enough so that non horsey people can pat her would be nice.