Early this morning while feeding my birds I noticed my dog run off barking back towards house then come back and forth between me and driveway. Once I got to end of drive away from my birds I could hear another bunch of chickens about 1/4 mile to the east by northeast. Warning cackles of hens and rooster could be heard. I could also hear a chicken squalling as being attacked. My dog was thoroughly stressed out wanting to run in that direction but also wanting to run back to my pens. He seemed confused. Nieghbors birds were making all sorts of noise for a good 30 minutes and I think more than one bird was actually attacked based on sounds. I was not aware of this neighbor having chickens. This is not the first time I witnessed a neighbors flock being attacked. Previous time with closer neighbor we intervened to get predator (raccoon). The frustrating part is not being able to help out. Neighbor belongs to group I have yet to meet. They also failed to respond within the 30 minutes attack took place.