After 2 yrs of no problems with predators, I lost my BA, one of my favorite hens, night before last. She was, more or less, gutted and the carcass was left behind. Found no signs of digging or destruction of the fencing. Of course, winter has finally set in so I can't have my windows open at night so that I can hear any disturbance outside, So, I'm wondering, first, what may have attacked and killed my girl. My guess is a stray cat that I have often had to run off. The second thing I'm wondering about is has anyone used, with success, something on the line of a baby monitor in their coop? A trail cam, at least the ones I've seen, will only tell me what was out there, but will not alert me when the predator is present and active. Have a feeling if there is one that would tell me that, it would be more money than I can afford. Secured the hen house more effectively last night with no loss of life. Of course, I don't know that the predator came back last night. I'm still guessing it's the cat since no effort was made to break in last night. Any help would be greatly appreciated.