Not sure about the dog. My Springer Spaniel is afraid of birds.I have a Great Pyr that actually barks and chases the hawks when they come. He walks among the birds, and even lays under bushes with them in the heat of the day. What do you think will happen if for some reason he ended up in the field with the Bresse? Will the rooster treat him as a potential predator??
Someone told me that Dark Cornish roosters are very protective as well.
Do you think your growly hen would actually brood chicks? I have heard that they aren't a broody breed.
That hen is broody. But apparently has a short attention span as she gives up after a day or so. But then she returns a few days later and tries to brood again. My sister is using a Bresse hen as a broody right now for the Easter Hatch-a-long. So they definitely can be broody.