Automatic sprinkler systems and a wider variety of seasonal crops (like corn or potatoes).
How much milk/meat/eggs a specific animal has produced.
Allow players to buy and apply colored ear tags to livestock. This would help track specific bloodlines or age groups at a glance.
Access a "Ledger" or "Clipboard" item that shows:
If the herd management isn't what you had in mind, here are other areas where features are often "made" or requested for v0.573: