We were in May 2016 with a group of 6 pilgrims in this area.
When we walked after the view point up the hill, we saw a sign in Spanish and English language "warning about wild dogs". The sign alone gave us a very uncomfortable feeling. Normally we walked as a couple or alone and met each other in a bar, but then we decided to walk as a group.
We didn´t see the dogs, but we heard them barking for a long time and it was a feeling of threat, I had never before in my life. Thanks God nothing happened.
We were the only pilgrims that day in Armenteira, so no one there to ask, if they had the same experiences.
The last night before Santiago we slept in the Albergue of Teo and met a Dutch/Canadian couple. This couple saw the dogs when they attacked a foal of a group of wild horses. At the next opportunity they went to the police and reported it.
In September 2016 my sister walked the same way once more and talked about her experiences and the warning sign she saw a few month ago with her own eyes to her pilgrim friends. But the sign was not there and they didn´t see or hear dogs. Everyone was amused by the fearful German pilgrim.
I think the authorities have shot down the dogs in the meantime.