Now that the production season has ended, virtually all my birds not harvested have been confined to pens till spring. The pens numbering in the mid 30's have been arranged in two clusters that slow predators so dogs have more time to foil the predators' attempts at evil doings. Pen arrangement also makes so I can step onto front porch and survey all with quick scan of flashlite. Dogs also alert me to disturbances but sometimes such disturbances are not actual threat to chickens, at least not mine, as dogs go in other directions as well. Often when threat to chickens is real the birds give alarm calls easily heard from front porch and dogs can hear from anywhere in house when they come in. Many times I can not distinguish between threats and non-threats based on what the dogs are barking at and I am becoming increasingly interested seeing what predator is doing without having dogs chasing it off first. Holding dogs back every time during night gets troublesome so I would like to have a method to hear what is going on without opening doors. Owing to most pens being a good 100 yards from house I do not think a baby monitor will work. Another option be considered is mounting one of those parabula things used at ball games so that it picks up sounds coming from the pens of interest. Wildlife folks use similar I think. Has anyone tried to use such?