Cayenne pepper never heard of that making them lay eggs.
I don't think we could ship a Muscovy drake all the way to Jamaica the drake would probably be dead by the time it arrived and shipping would probably be really expensive too.
Have you looked around there for a Muscovy drake seems they...
Something must be wrong with her reproduction tract. Very sorry for no eggs but hopefully she makes a nice pet. Maybe more females added to you flock for eggs?
either a layer or offer oyster shell separate so she can eat it as needed. The drake won't eat the OyShell, I'd say just be patient the eggs will come I've never heard of a barren Muscovy, but if the drake is mating her relentlessly that can post pone eggs too, you might want to think of adding...
Do they roam over a wide area? they are excellent at hiding nests, Or she may just be as close to laying as she can be, My Muscovy' s are usually 8-9 months old before they begin to lay, so hopefully you'll see some eggs soon. Are you feeding layer?