Hi! Has anyone been successful in feeding different types of hay to horses in the same paddock?

Winter is coming and the grass is drying out already where I am. We have one horse that is on fescue and alfalfa, and the other eats Bermuda. The horse on fescue has coliced before due to feed changes, so I'm too nervous to switch him to both be on Bermuda. Does anyone have any hacks or ingenious ways to keep them on different hays through winter while the grass is gone?

-Asking for hungry gelding friends.