When a woman arrived home, she was shocked to see her dog covered in what looked like bug bites. Then, she got closer and knew he needed to go to the vet. There, she was told what the odd marks really were, and she was horrified. Jackson, an English Mastiff, (left) with his owner Hayden Howard and her son (right) (Photo Credit: Facebook) Hayden Howard of Seymour, Indiana, is the proud owner of an adorable, 100-pound English Mastiff puppy named J…