So I'm in West Karana trotting around the Millers field when I spot a ground spawn.
I pick up a Sack of Hay, look it up here, and find there are some conflicting posts on how it supposedly stops your mount from consuming your food while it's in your inventory.
It appears I drink the same amount, but I really do think I eat a lot slower.
Metabolism 3 + Hay ftw?