If you don't mind have "hollers" and "relmets"..........LOL
The WILL breed together and you'll have a bunch of half breeds if you let them hatch.
Do you fly your rollers and helmets? That might be a problem............maybe someone who actually KNOWS should answer you......
Pigeons will generally mate with their own kind if they can. I have keep multiple breeds in open loft setups for years and can't ever recall having crossed or mixed young that I did not know of or plan to raise. The thing to avoid is having extra males in the breeding loft - they are nothing but trouble. Extra hens are best kept seperate or with young birds too, but they don't contaminate your breeding.
thank you all i have 2 males and I want to put the helmets in w/ them for cage is to small I will use it as isolation cage or something thanks again Kevin,hey bob cat did you fly all your birds together in open loft too or not?
By open loft setup I mean , the birds were kept in the same loft with open front breeding boxes. They could "mingle" with one another! Your helmets probably won't fly with your rollers, but if your just giving them free flight and not concerned about how your rollers perform it won't hurt to let them out together. I never flew my breeding birds when they were nesting or feeding young.