Aggressive dog(pitbull)

Discription:The Pit Bull immediately strikes one as being a dog of power, passion and undying willingness. The brick-like head, which is especially broad between the cheeks (to house the powerful jaws), is carried upon a thickly muscled, well-defined neck. The neck runs into a deep, thick, well-sprung chest. The American Pit Bull is a very muscular, stocky, yet agile dog that is extremely strong for his size. The ears are generally cropped, though this is optional. Docked tails are not accepted by the UKC or the ADBA. The eyes are round. Both the ADBA and the UKC do not accept blue eyes or the coat color merle. The American Pitbull Registry does accept a merle coat. The teeth should form a scissors bite. Its coat is made up of thick, short, shiny hair. All colors are admissible. The tail tapers to a point.
  Height, weight

The American Pit Bull Terrier is both powerful and agile. Actual weight and height are less important than the correct proportion of weight to height.

 Height: 14 - 24 inches (35 - 60 cm)
Weight: 22 - 78 pounds (10 - 35 kg)

A very common misconception is that APBTs are muscle-bound hulks that weigh in around 85 pounds (39 kg) or more and this is generally not the majority. Most of the APBT's that are that large have been crossed with other breeds and are being called American Bullies. The general public often gets American Bullies mixed up with the American Pitbull Terriers. American Pitbull Terrier vs. American Bully