I build my goat sheds big enough to stand in. My goats are short. Doing something like this would maximize the goats' use of the tall space. Great idea! I'd add edges to each shelf and bedding on the shelves. www.oakhillfaintinggoats.com
How to Build a Goat Shed with a Loft Bed for Almost $0
And someday, when we have coops full of rescue chickens, we'll have rescue goats running and playing on their goat fort. /LOL you need a couple thick poles with a 2x6 going across from one to the other. Goats really enjoy that. Telephone poles work real well too.
snowshoe acres loves this simple goat shelter with resting bench. Build a resting bench with enough room for Your goats to walk underneath & lay down in deep warm bedding. Bedded 'den' areas under benches or inside study open sided wooden boxes will help trap body heat for warmth during extreme cold winter temperatures.