Client can always use food to reduce temper of horses, llamas and donkeys, ignoring animal's temper value

The bug

When a horse has a temper of 100 the player can still feed it client-side. However once the inventory is updated, the item count corrects itself.

To reproduce

1. Feed an untamed horse with a stack of golden carrots
2. Open your inventory
3. Click onto the slot where the stack of golden carrots was
   → Some of the carrots reappear