Sounds like a cat, mink, or weasel. I don't know about a regional map or list, but the PAGC has a decent list of predators, and tracks. Although there are some predators they do not list, as they do not officially recognize the animal as a native with sustainable populations. Did you check under the Predators and Pests forum?Question, is there a list of regional predators? or map? One of my chicks was attacked yesterday, his momma saved him but I don't know what grabbed him. Something with a small sized carnivorous mouth. Holes from the canine teeth are only about an inch apart.
That being said I was out taking some pictures of the new chicks and decided to get a few of the other birds free ranging. I let them all out ALL day today. I was nervous for Pee Wee (Serama) and Thunderbolt & Daisy (Easter Eggers) but they did great!