"Our new mare is in heat, and you're going to make an excelent mate for her," the lady says, laughing.
As the change begins, you look down at your hands and feet as they start to transform into hooves, your ears change and move up your head as you fall onto all fours. You try to cry out, but can only whinny as your body changes into that of a horse.
"Perfect, now lets make sure that your a stallion, don't want to have to get another Mare," the zookeeper says, and goes to check your, equipment. "Sometimes the change includes the gender, so lets see..."
What are you?