I tried this RP a few weeks ago, under the title Breeds, but it kind of got kidnapped by a couple of crazys. So I'm trying again under a different name.

The scientist have found a way to blend human and animal DNA. The government has agreed to fund this experiment. The question was where to get volunteers. After much discussion it is agreed to offer the option to young criminals as away to avoid jail and turn their lives around. As one of these young criminals you will have to learn to control your animal instincts and learn to change at will. If you survive the training you will became a solider defending the United States. 

The breeds are kept an apartment complex that was build under ground. The idea was to give them enough space not to kill each other. It was understood that the breeds would do exactly what they were told or they would be destroyed. They would be tested and educated. It was hoped that they would be the soldiers of the future saving others.