Yeah at first glance I thought dog. But then looking at the mouth and the way it's flattened out, I was wondering if it could be a fox or small coyote. A dog would sure be easier to deal with. Foxes and coyotes will continually return and try to find a weak spot to break in. Must be hungry if it's trying to get your chickens. No other canines on the game cam? It's probably feral and has a circuit it checks at night for food. That's why your dog keeps hearing it when it comes around. Our Humane Society will lend a humane cage to trap (if the cages are not all out in service) You could try calling them if you think your neighbor can't get hers back from her son soon enough. Either way, if you trap a dog, you are responsible for taking care of your new problem. I don't know any where that will pick up a trapped dog so be aware you'll have to provide some care for your nuisance catch and take it to a shelter. I hope someone didn't just drop the dog and it is trying to live on what it can find for food. You never know ... I like your game cam! I like that it tells you date, time, temp, moon phase and all! And if you have any doubt whether the culprit is a dog or something else, try moving your cam a little closer. The next pic would surely be spot-on.