Jealous chooks???

Jealous? I doubt it. Probably more offended that you had the nerve to add strangers to their coop
Chickens aren't fond of change, and they don't like new additions to their living space, be they other chickens or waterfowl. They'll get used to them, but you might want to consider either separate housing for the waterfowl or an alternative water situation (which is what I'm assuming is the source of the mess that was bothering you). Waterfowl are messy critters, and they especially like to play in their water. They manage to spread even the tiniest amount of water farther than you could imagine. When I had ducks and geese, their drinker sat on top of a wooden square with hardware clothe over the top. There was a bowl underneath, so when they'd dabble in the water, it would fall through the wire into the bowl instead of on the shavings (straw, or whichever bedding you use). Their pool for swimming was outside, as far away from their house as it could possibly be so they didn't go splashing in the pond and head straight to the coop soaking wet.

Best of luck!