i really dont think she is an english mastiff some of her features dont match up. she is verry cautious around other dogs. when another dog approches us at the park head on, even super friendly, she will think they are a threat and pin them down or let out the most deepest threatning berk i have ever heard; a million times more theatning than a pit bull would ever be. around people, she is a afraid at first, then she starts to act more brave, and warms up to people quickly. she is a beautiful dog with a moderately long and sguared- off muzzle. she has a small underbite.ears that hang close to the head, a muscular neck with a dewlap. verry brod chest. butt swings from side to side when she walks. huge paws and verry well padded. thick tail that comes to a point. strong back legs. corse coat. one white nail one every paw all others black. she is about 22 inches at the shoulders and weighs about 80 pounds.