I've been programming with Unity for 3+ years. Currently I'm working on games for android and iOS.
I made a game where you can tame and ride 30 animals including pigs, elephants, cows, donkeys, sheep, goats, horses, etc etc for android platform with plans to port to iOS when I finish and release it.
I think some HUD elements will receive visual upgrades to make it more "in the farm" mood, right? Sounds like a great game for kids, good luck with it!