Pretty damn good! Especially as it's only your second pony drawing! When drawing hooves and ears the main thing you need to take into account is the angling of things, just like when drawing people it's important because which way the ears face can greatly change how you draw them As for hooves themselves... It sounds stupid but I make the gesture myself that the pony makes, that way I know which part of the hoof faces which way... But I'm weird like that