Cowgirl - G. R. Gemin

Everyone at school knows Cowgirl's a weirdo: six foot tall and angry, the only conversations she has are with the twelve cows on her dad's farm. But with her abrupt arrival in Gemma's life, everything starts to look different. And with her only friends in mortal danger of the abattoir, it turns out she and Gemma have a mission on their hands.