Roosters terrorizing male goose

[TerryW]

Anyone ever have problems with a rooster attacking a male goose? I just got a new male goose for my 2 girls and the little polish rooster started chasing and attacking him. I had to put the rooster in a pen and all was fine until yesterday when my other polish rooster suddenly chased the goose. These 2 roosters got along fine with each other, I don't understand what their problem with the goose is. He's just walking by with the girls minding his own business.

 

[nuthatched]

He's a big, new animal. Chickens don't like change. How did you introduce the gander.