I build and enjoy at Cold Tiaga, trapping Rabbits and Chicken. Afterward, I felt something missing in that area and Minecraft should add Deers for Cold Tiaga(snow) and Tiaga(no snow). I don't like bring Cows in Cold Tiaga and build Barn. Because it is too far away for finding Cows, rarely got 2 in Cold Tiaga. I prefer living in Cabin as Hunter. So here is 2 type of Deers...
Antler Deer (Buck)
Non-Antler Deer (Doe)
I don't know what to do with Antler, might be craft to bone meal, something else to use or not need. So those should spawn at Cold Tiaga and Tiaga. If grow crops then Deers will come to eat it or destroy it. So it would be fun that you'll find out missing crops when you came back from Minning or Cutting Trees. Then you can start hunting them or capture them. Even breed them by using Apples or any Fruits.