Okay, My two Great Pyrenees are in separate pastures with goats of their own. They are brother and sister, appx a yr old. They have begun barking when the sun goes down and don't quit until it rises the next day. They didn't used to do this!! My hubby and I can't sleep through it and I can't make them stop. Suggestions please, before our neighbors hate us and we go crazy from sleep deprivation.