Head First by Samantha Black

Alexis is running away from heartache. Expecting a proposal, she is devastated when her boyfriend unceremoniously dumps her instead.
She runs all the way to New Zealand, where she has inherited a sheep farm from her reclusive grandfather.
Life on a farm is not quite what she had expected. Her sheep are surprisingly aggressive, and her farmhand works hard to see her fail.
Luckily for her, her handsome new neighbor, Mason, is always happy to help out a struggling city girl.
But when disaster strikes and Alexis makes a critical misjudgment, her newfound confidence takes a battering. She must dig deep into her heart to work out what she truly wants from life, and to find the courage to fight for it.