I have a goose (she will be 15 yrs old next March) that prefers being with my chickens although she sometimes picks on them, but the ducks chase her, so I prefer her being with the chickens. I just make sure I place the food and water in a spot where she can't corner the chickens.
I agree with...
My two ducks (male and female) are surrounded by electric fencing and they also have a huge tree where I put their food and water so they are not sitting ducks. :gig They mostly stay there or wander under the lean-to which is about 20 feet away.
A big animal like a goat will deter a hawk...