I call her front , ask her to sit , she looks back at her butt , sits , and then pops a squat . My dog PEED in the Obedience Ring . I can blame the cold , I can blame myself , I can blame it on the judge for not taking his lunch break , but I ca n't blame Mackenzie .
According to the above context, answer the following question.
Why did Mackenzie pee ?


Mackenzie was nervous