Polar bear pets

Polar bears could be bred with raw cod or salmon. A baby polar bear will occur from breeding,and it's parents won't become aggro towards you,unlike with natural-spawned polar bear cubs. A baby polar bear's growth can be sped up using raw cod or salmon. The baby you get from breeding will trust you and protect you from monsters that atack you. The "trusted" polar bear,just like "trusted" foxes won't follow you unless you are using a lead. I hope you like my idea.