Well we all have opinions I guess. I'm not trying to argue just have a different opinion. I raise my GPs with the chickens having access to the pen from the day they are born. They tend to be naturally protective of them. And a well bred Pyr will bond to any animal they consider belong. Try grabbing one of my chickens and making its squawk and see if you aren't surrounded but upset dogs! I like my Pyrs because even if they aren't around kids on a daily basis they have a sense and know it is a baby and are very loving and gentle with them. I've never had to correct a pyr pup over once or twice at most to teach them a chicken isn't a play thing. A firm no works. The only time my pyrs roam is when I have a female in heat. I do plan to electrically fence the property though because of that reason. Most pyrs, when mature, establish an area to patrol and stay there. Since I have the intent of producing a litter every couple of years I have to keep an in tact female.
My dogs don't just stand and bark. They bark when they hear or perceive a predator. They do however have extremely good hearing and they detect things sooner than we can for sure. But yes they do bark which to me is total comfort that the birds are safe. I have pens and coops I never shut up at night and birds that free range 24 7 thanks to the dogs. Just a little more food for thought. This looks like bonding to me! Taken in my yard.