Becky
If you’re not putting out separate hay piles for them then you probably ought to. And as long as there’s a large enough water trough that Obie can’t drink dry before Waylon gets any then Waylon’s probably getting enough water by waiting to drink until Obie walks away from the trough. But if Obie continues to beat up on Waylon, even after they’ve been together for a month or so, then you probably ought to divide the pasture somehow to where they can still see each other but can’t fight. I made a small paddock for my old horse, Tennessee, out of electro-braid rope and a fence charger, not because of agression, but because Tennessee needed a dry lot with no grass because of his metabolic issues. It works out well for me.
Becky