We have a bald eagle nest less than one mile from my house, and tons of hawks, buzzards and great horned owls in the immediate area...we even had a ten foot alligator on my next door neighbor's porch a few years back! When an owl started perching on the peak of a nearby roof during the late night bedtime walk my husband gives the dogs (and swooped down one evening), we have reverted to pee pads inside. We even have to watch them carefully if we are outside in our screened pool lanai since the birds do start circling when they realize the dogs are out with us!