Villager and Animal Ancestry

I noticed that baby villagers don't have colored coats anymore. I miss that because I could keep track of who was new and they grew up with trades. I am very interested in family trees/lines. Baby villagers should have colored coats, like white, purple, green, red, blue, etc. Also, someway to see who their parents were/are. I think that would be really cool. I love that kind of stuff especially with the wolves. If it were possible to keep track of the family lines for all the breedable mobs, perhaps through some new craftable gadget or something, I think it will add an interesting piece to the game. I like to raise and grow villages, as well as packs of wolves. To be able to see who everyone's family is, is exciting to think about! It's one of the reasons I played Microsoft's Zoo Tycoon.