Can Standard chickens and Bantam chickens coexist

[Gersbud]

I have a flock of a variety oc chickens, aracauna, black alstrop, red star, brahma,cochin,specked sussex,white,barred, and partidge rocks. and probably a few I didn't mention. For this entire flock of 28 chickens I have 1 bantam roo. Been with them for awhile no prob. But recently I added to the flock 2 bantam golden polish. Poor things are never allowed to venture outside of the coop.

Is this normal. Will they eventually let the polish be part of their flock or not. Breaks my heart that the other chickens are so mean to the 2 polish. They are so cute