Well actually, the velociraptor was only about the size of a chicken and was covered head to toe in feathers. While still a formidable foe, the only real danger would be it's sickle claws getting your stomach of eyes. Additionally, the velociraptors in Jurassic Park were intended to be Deinonychus, although the deinonychus were still inaccurate and outdated, they were around the correct size.