Some communities have banned the Russian and Irish wolfhounds under the mistaken belief that they were part wolf. Most targeted breeds are large dogs, many weighing over 100 pounds. Among the smallest are the pit bulls, which tend to weigh 40 to 70 pounds. Bull terriers weigh 45 to 65 pounds, and Staffordshire bull terriers weigh in at 30 to 40 pounds. All dog owners have a responsibility to the public to raise and maintain their dog in such a way that it is not a threat to human or animal safety.
Breeds vary in appearance, but also in temperament, activity level and other behavioral factors.
Researching a breed's good and bad points is essential before you buy. Buying a dog from AKC or UKC lines bred by experienced breeders who emphasize good temperaments is the best bet for obtaining a trustworthy companion, but any dog can become as good or bad as its upbringing. Hungry Minds Inc. She earned a doctorate in psychology and neuroscience from Florida State University and has done research on dog behavior and sensory systems.