Barry and marine Owen Grady were hired to train the raptors. Four raptors were created/bred for the project: Blue, Charlie, Delta and Echo. Owen was probably present at their birth. The raptors were 73% trained and Owen taught them over 40 commands. A small incident occurred where newly hired Jurassic World worker Leon fell inside the paddock when he was feeding its inhabitants where he was met with hostility from Blue and her subordinates, the Velociraptor Paddock's raptor pack. Thankfully for Leon Owen Grady jumped in front of the raptors and calmed them before anything bad happened.