Years ago before the extinction of all the dinosaurs, something arrived on the planet. A flying saucer from outer space landed on the surface of Earth to collect DNA samples, but their biggest mistake was leaving the door to their ship open. Just before leaving, a group of velociraptors invaded the ship, and took off.
Seeing the mistake they made, the aliens tried to come up with a plan to get their ship back, but they were too late. The asteroid that came to destroy all the dinosaurs arrived, and the aliens got destroyed along with them. Back with the raptors that stole the alien spaceship, they have taken over the aliens mission in collecting DNA samples, but not from dinosaurs. They even took over their home planet, while learning their language, and scientific ways. Once every year, the aliens have gathered DNA from all of their homes new animals.
Centuries later to this year, the news brings up the UFO sightings about the raptors, who were using DNA to transform humans into said animals. Basically for sexual favors no less. You hear this, and get shocked.