EE bantam aggresive towards ducks

[Bekahh]

I currently have chickens and ducks I recently got added a black sexlink, 2 EE bantams and an olive egger cockeral I finally let everyone out to free range together there was a small scuffle between the Cockerel and my rooster but it was quickly resolved and there were no other issues everybody was free-ranging in the yard together and one of the Easter Eggers decided to go back to her coop and stayed in there for a bit but when one of the Ducks came over and started investigating her the chicken started biting and they started fighting the chicken quickly had the duck who is easily five times her size cowering in the corner but later they were by the water bowl and one of the Ducks appeared to challenge her and soon all five we're going after her I stepped in and tried to grab her away but she flew over them and ran away if anybody has any advice on how to resolve their issues that would be great if any part of the story was unclear or not detailed enough please ask questions

 

[Tiana's chickens]

Hmm.. do you have a separate pen you could separate them into?

 

[chickens really]

My Ducks and Chickens are housed separately. They don't get along.

 

[Bekahh]

I have them in different coops but all my birds free range in the yard together in the day. Ive never had any issues until now