So make sure you have it trapped before you try to tame it because it will take off and fly rampant across the whole map and lead you on a wild goose chase, this happens when it is close to being knocked out. This happened to me twice, once it lead me to a giga then flew into its mouth then the second time across the map for 30 mins. Also make sure you use tranq darts because arrows will kill them.

While trying to knock it out, make sure it isn’t too damaged as it doesn’t have too much health, trying to tame it with a crossbow could kill it. If you have a snow owl it makes it easier to tame as it can be healed by the owl (of course to tame it easier you need the creature)

Recommended to use pteranodon or any other fast bird. Once you have spotted one, build a trap consisting of 4 gates in a line with small gaps so the snow owl can’t fly out. Place one door on the side that is farther away from the bird and leave to other one open. Then take your bird and agro the bird by flying close to it or shooting it. Once it is near the trap dismount and punch it so it attacks you and not the bird. You also wanna make sure your bird is passive for this. Then lure it into the trap and once it’s in put the door on and tranq it. You could then feed it the recommended food and once it done taming you have a snow owl.

Argy, but with a twist. They deal “true” damage, albeit low, thus not hitting anything that is wild. Only carnivores agro to it. To tame, build a 3x2 cage, make it three frames high, put a gate frame with a gate(make sure to put it on auto close and open) on the 2-wide end of it and cover the whole thing with ceilings. Then pick up one of the frames. Kite it into the cage with a ptera and fly out of the opening you’ve made. Congrats, you’ve trapped yourself an owl. Use tranq darts - they are pretty fragile.

Griffins are tamed the same way.

If you're not running a net gun don't worry. They are fast in the open but if you get them in a standard argy trap, doors closed or noy....they're a super easy tame with tranqs and they don't do too much damage while chasing you into the trap! Heat vision, healing abilty for yourself and tames, owl pellets make great fert as well as gacha food for crystals... GREAT tame to have and their saddles are also on Fjordur as well! R-Snow Owls cannot mate with ordinary snow owls by the way..

Turns out I was wrong. Fact checked myself and what I was able to do was heal the doed BEFORE knocking it out, which allowed me to achieve peak taming effectiveness after the rex very nearly killed it. That said, I verified I was wrong, you can't improve taming effectiveness by healing the dino with the owl AFTER it's knocked out.

However, what you CAN do, is heal something before it goes down if it's properly trapped which is still very useful. A good application of this would be rock elementals, which are notoriously difficult to knock out without taking too much damage to keep max effectiveness. If properly distracted, you can heal them with the owl before you make those last two or three cannon ball shots.