And hell YES, i was scared. Dr Brad - i was canoeing in the everglades and came up next to an American Crocodile sitting on the shore, about 10 ft away. As i was filming it, it jumped in the water. I needed new shorts. Perhaps you should look into other hobbies.
All dogs have to be trained to eliminate in the proper areas.
But dont assume an older dog is housebroken. Maine Coons can be very large cats. This cat could be a Maine Coon or a Maine Coon Mix. Be sure to familiarize yourself with 1st aid procedures if you insist on taking a whack at it yourself. It's probably fat.