Original sentence: Although kennel clubs and registries recognize the Labrador in variations of only three colors—black, yellow, and chocolate—some breeders sell light-colored yellow Labrador puppies as a very rare "white" labrador or poorly colored chocolates as a "silver Labrador", for a much higher price than the other puppies in the litter, while these dogs would normally be considered to be  unacceptable colors and worth considerably less than other puppies
Edited sentence: Every potential Lab owner must know that the Labrador comes in variations ofonly three colors: Black, Yellow and Chocolate.It has become common for unscrupulous and irresponsible breeders to attempt to sell light colored yellow labrador puppies as a very rare "white" labrador or poorly colored chocolates as "silver labrador", for a much higher price than the other puppies in the litter