New Crop/Animal mechanics

I think it would be cool if animals were able to eat certain crops from the players field. For example Pig could eat carrots, potatoes and beetroot since they are omnivores. Chickens could eat not fully grown wheat plants and Sheep and Cows could eat fully grown Wheat crops. Also zombies could maybe try to damage the players field, which is why some of them could carry carrots and potatoes. This would add the necessity for players to protect their fields with something like a fence without increasing difficulty too much. The mobs should only try to get to the field while they can pathfind to it to avoid crowding mobs around a protected field. Maybe protecting the field could also be done by some kind of scarecrow item which could be placed on the field to scare mobs away in a certain radius.