How big are these bales??? Mine are @ 1500 lbs and last 2 weeks for 2 horses! I peel off the layers and hand feed 2x a day too.
My horse and 2 donkeys go through an 800lb round bale every 9 to 13 days, depending if it's an orchard/blue grass/timothy mix or brome/orchard/timothy mix. It keeps everyone more content and my sinuses happy because I'm allergic to the hay dust too.
My tractor does all the work and I slip a slow feeder net on it so they can't scatter it around and make a mess.
Life is much easier and cheaper with round bales.