Thank you.It can be a hit or miss, but generally if you have them mixed with other breeds and free ranging, they are fine. If you coop them up together, they are guaranteed to bully the other chickens. Hens are somewhat bigger bullies than the roosters.
I've never had run-ins with dogs, so I am unsure of that! I would think and Indio would try to run away unless it become a life or death situation; they really are gentle giants if given the space, only resorting to fighting/bullying when they don't have adequate space.