Well I can't think of any rooster breed that could defend his flock from dogs- unless he died slow enough so the hens could escape. Either the chickens or your dogs need to be surrounded by electrified fencing.
I hope you enjoy being a BYC member. There are lots of friendly and very helpful folks here so not only is it overflowing with useful information it is also a great place to make friends and have some fun.
If you would like to share Pictures and Stories of your flock, you have come to the right place. BYC’ers never tire of these and do not back away slowly or commence eye rolling when the photo album or home videos come out