kantyr calf

it would be really cool if my kantyr calf would sit when idle like the kantyri calf in the silent expanse do, this is also like not just for kantyr calf but im not sure how exactly it would work, but it would be really cool if it could get bigger as it levels up and it can end up the size of the large ones in the silent expanse, i understand not doing that one, but i would really like to change the color of mine to be like the chalky ones, or like the purple ones for other ppl but i would specifically like to change mine to the chalky color