Put up a game camera. You may be surprised what predators lurk around that you may not see but the camera will. I raise White Leghorns and Rhode Island Whites As well as Brown Leghorns and Rhode Island Reds and When I have lost birds to predators mostly it has been the white birds. I have lost some of my RIR's but mostly the whites. In the past I have lost birds to a coyote, bobcat, fox, possum, hawk and owl. With each loss I beefed up my security. Because of a coyote, possum and a skunk, I have electric wire going around my coops and pens. Because of a fox that dug under a gate and killed some birds I put concrete under all of the gates and because of hawks and owl, I put heavy duty netting covering all of my pens. A skunk was after some youngsters and was attempting to dig under a gate. I tried to chase it off but it turned towards me and stomped it's feet so I shot it. I had a coyote jump over a 5' fence into a pen and kill some birds. Some birds went over the fence with the coyote after them. I shot the coyote in my back yard while it was chasing a bird but had #6 shot in my gun so I didn't kill it but I'm sure I hit it and it ran off.