One of the easiest trap free way of KNOCKING OUT one of these snow foxes out is to use a karkinos and grab it with the left claw specifically. Do NOT grab with the right or it will still be able to teleport and hit you, instead use the right claw to clear its clones if it managed to summon any and once the area is clear just hop off and use a longneck and pump it full of darts. I do not recommend using a compound bow as it tends to get quite low HP or even often times kill it. yes you are able to tame it passively by sneaking up and claiming it (unless the removed this option) but this method is how to safely tame it without using a trap or doing to "claim it" method. This isn't efficient like the walk up and claim it option everyone uses but if you decide to ko tame it this is the way to go