To tame use a argie trap. I used 6 stone Dino gateways you could probably use 4 but I haven't tried. 2 gate doors, it worked pretty well but get it trapped then kill everything in the area so your owl won't die or lose t.e and that has happened before. Hope this tip was useful.
WARNING: When raising one of these prior to hatching be sure to have at least 3 fridges full of meat because these babies are absolutely savage and eat around three to five meat at a time! Help spread the word!