We have seven dogs. Oldest is a Pomeranian with hip dysplasia and a serious underbite problem. Then there is Bela, our Sheltie that was born with a deformed front right leg and foot. Next would be Mikey who we found at 10 wks old in the middle of a busy street covered in fleas and with really bad worms...he is Greyhound/Lab. Then there is Red our German Shorthaired Pointer who we found as a pup abandoned in the parking lot of a WalMart store. Next are the sisters, B.T. and Sara who are an accident between a Pit Bull and a Boxer/Mastiff mix. They were rescued in the parking lot of the animal shelter before the people could take them in and leave them there. And finaly (and my favorite though I love them all) is Duke our Anatolian who weighs in at 120 pounds. He is pure white and the true protector of our farm. Duke was dumped out in the country and our Vet had him. He spent his first year in a pen with weekends at one vet tech or another. I got him when he was about a year old, I was sitting at the vet waiting for an appt with another of our dogs when they brought him out to "say hello". He looked at me, raised up on his hind legs and put his front legs on my sholder and gave me a big kiss. Well, that was that, and no I don't think the vet did it on purpose.
So, yes, we do have dogs and they do protect everyone including our chickens, ducks and geese. But they were adults before we got the birds. We have a 5 foot fence between the birds and our back yard and the dogs do not go into the bird pen. But they do lay along the fence line, watch the birds and react if anything, walking or flying, comes around.
Duke has stopped a couple of Raccoons and Sara and B.T. stopped a Copperhead from going into the bird area. They protect but I don't think they know they are doing it. Just that the birds are a part of their farm and no one messes with their farm.