Chugs, as previously mentioned can inherit different physical traits from both their parent breeds and this includes the good and the not so good. Some will look more like their Pug parents whereas others might inherit more of a Chihuahua look. With this said, their coats tend to be fine and straight with dog’s having shorter hair, but if there was a long-haired Chihuahua in their ancestry, a Chug might end up with longer hair too.