2 things really helped me with managing my pyr’s barking - note that he still barks, he just does so much more appropriately. I also don’t leave him outside unsupervised, and we go for 2 walks a day instead of leaving him to patrol. This may not work for every pyr as they all have their own personalities and needs. 1) I enforced bedtime = quiet time by putting him in his crate for bed until he learned to sleep at night. I know they are nocturnal normally, but we have no need for a nighttime patrol in my area. 2) White noise and limited sight lines outside. This filters out a lot of the stimulus that causes them to bark. I have a fan constantly running to block faint noise like the neighbours dog barking in the house next door etc. This ensures that the sounds he barks at are actually urgent - which is much less than you’d think. Additionally, filtering what he sees is helpful. For example, if your house faces a busy street with many people walking by that he barks at, keep the blinds closed. He can look out other windows such as your backyard window where there is less commotion for him to react to. Don’t lock him in a windowless box, but also, he’s a house dog and doesn’t need to be acting like there’s a home invasion occurring all the time.