your right they said it probably won;t survive in the wild due to it's massive size.
And color.
Lions and tigers are not only apex predators, but niche predators as well, the only animal this thing could feed on is water buffalo, and other large bovines...but it's color is not fitting for that tropical environment, and there are no water buffalo in the snowy places. Yaks and Bison are diff, yet this animal is not adapted for it...and of course, this animal is sterile.