Like how many pets exist in this world by years of training for example:
pigs can find mushrooms and a new item called truffles.
Hare can be trained to help find crops for you.
Wolves if tamed by feeding a cub from young can be trusted only after the 3rd generation can track wildlife for you by have a piece of scen you have gather from the animal.
Bear is mountable and can attack also, can only tamed by stealing a cub and takes a lot of meat to be even not killed you and killed front hunger
New animals:
Camels is the only animal that does not slowed down and die easily in the dessert.
Insects like ants and flies gets attracted to dead animals
Eagles can trackplayers and animals from the sky it can not see anything underneath cover and pin it to your map.(i know unrealistic, but fun)
Capture birds can sing song in cage can also indicate if there is coal mine, explode if using torches, not lanterns
camondo dragons or snakes that gives you poison arrows by hunting with bow much eieser but will have a percentage of the meat being unable to be usable.
Verdict
I still want to make the game challenging don't want have pet and everything is easier. I just want to make one thing easier. Also any other pets will be cool!!