Once I’ve started a bed I never rehydrate pellets. That’s what the horse pee does. As long as there’s enough already re hydrated bedding left behind I just add in a new bag as needed. It puffs up on its own in short order.
I’m not adding in three inches of hard pellets in a bare stall. I’m adding hard pellets into an already established cushy stall. I don’t see how that’s wasteful.
My mare I only add a bag every 2 or 3 weeks. She’s that tidy. My gelding I add a bag a week and swear a lot.