I just shared this on another post---figured some might not see it there so I copied/pasted it here.
I wanted to tell you all what I have done and it helped a lot back before I got my GP dog. My chicken yard is about 3/8th's of a mile from my home so a baby monitor will not work for me, but might for a lot of you----if you are in range set-up one---for sure monitor during the night---always have a gun(if you are in a area you can) light, slip on pants and shoes ready if something starts happening in your coop. you might have to cut it off in the early AM when the roosters start crowing---LOL so you can sleep a little longer. Being mine is so far away I set-up a CB radio at the chicken yard with a flip flop timer I made. The timer turns the cb on with a power mic that is tied compressed so I can hear everything in the area of the coop/pen. The cb stays on 10 seconds and off 30 seconds 24/7 7 days a week. Most everyone that knew me knowed I had this set-up on a base antenna up in the air. CBers----some as far away as 30 miles in neighboring towns say that some nights they turn to that channel and just listen to nature---the frogs on the lake close to the chicken pens, listen to the crickets and for sure the roosters crowing in the early am. I could be riding to the local town to do somethings and could monitor the chicken pens from miles away with the CB that was in my truck----Sure would have not done any good if I had a attack when I was miles away but at least I knew what was happening and did not have to wonder and could rush home if needed.
For those of you that are out of range for a baby monitor, you can go get you a GOOD rechargeable set of GMRS radio's with VOX(voice activated) put one in your coop and carry the other on your person any where around your home or even to the neighbors or a local Store several miles away(with a good set). When you are in the house or At night set the one on your person in the charger to recharge, then once a day when you visit the coop switch the batteries(I set mine up using a small solar panel to recharge a bigger battery that I had attached to the GMRS radio at the coop so I did not have to switch the batteries). These can help so much allowing you to hear what is happening. I have had to rush out the door several times to get to my coop and have got the predator before he slaughtered a chicken, have lost a chicken or two too, but eliminated the predator.
I had a Good Pitt bull that lived with me in the house or out---every where I was(kinda) if I had a problem at the coop, he would hear it on the monitor and would be at the door waiting on me----When I open the Chicken run he would do a quick sweep and most of the time grab the predator and "take care" of it---He was a Good Dog!!! So far with the GP dog I have not lost any chickens to predators in over 2 years and some of you know that I have had as many as 1232 at one time in the pens in her patrol area. She(GP) has me a possum or a raccoon or a stray cat, even some snakes laying there some times when I get there in the mornings. She is a Good Dog!