A gigantic alligator has been killed after it was found eating cattle at a farm 215 kilometers north of Miami.The animal measured 4.5 metres and weighed over 362 kilograms.Lee Lightsey, owner of Outwest Farms, Inc. in Okeechobee, told Fox 13 News that it was the largest alligator he and hunting guide, Blake Godwin, had ever caught in the wild.The pair found the gator in one of their cattle ponds while leading a guided hunt on April 2.