Dobermann
Size and proportions
Although the breed standards vary among kennel and breed clubs, most follow the standard set by the FCI, which describes the size of male dogs as 68 to 72 centimetres (27 to 28 in) at the withers; The Kennel Club in the UK quotes 69 centimetres (27 in) as being ideal. The size of female dogs, according to the same standards, is 63 to 68 centimetres (25 to 27 in), with 65 centimetres (26 in) being ideal. The Dobermann has a square frame; its length should equal its height to the withers and the length of its head, neck, and legs should be in proportion to its body.
The standards for the weight of the Dobermann are also described by the FCI. The ideal dog must be of a sufficient size for an optimal combination of strength, endurance and agility. The ideal weight of male dogs is described as 40–45 kilograms (88–99 lb) and the ideal weight of female dogs is described to be 32–35 kilograms (71–77 lb).
Color
Two different color genes exist in the Dobermann: one for black (B) and one for color dilution (D). There are nine possible combinations of these alleles, which can result in four different color phenotypes: black, blue, red, and fawn (Isabella). The traditional and most common color occurs when both the color and dilution genes have at least one dominant allele (i.e., BBDD, BBDd, BbDD or BbDd) and is commonly referred to as black, black and rust, or black and tan. The red, red rust, or brown coloration occurs when the black gene has two recessive alleles but the dilution gene has at least one dominant allele (i.e., bbDD, bbDd). The blue Dobermann has the color gene with at least one dominant allele and the dilution gene with both recessive alleles (i.e., BBdd or Bbdd). The fawn coloration is the least common, occurring only when both the color and dilution genes have two recessive alleles (i.e., bbdd). Thus, the blue color is a diluted black, and the fawn color is a diluted red.
Expression of the color dilution gene is a disorder called Color Dilution Alopecia, a kind of canine follicular dysplasia. Although not life-threatening, these dogs can develop skin problems.
In 1976, a "white" Doberman Pinscher was whelped and was subsequently bred to her son, who was also bred to his litter sisters. This tight inbreeding continued for some time to allow the breeders to "fix" the mutation. This severe inbreeding not only intensified the production of "white" dogs, it also amplified their health problems. White Dobermans are not recognized within professional breeders and continue to be reproduced by unethical breeders marketing them as rare in order to charge more for an animal that would never win a show competition. The white colored Doberman is prone to suffer long term medical conditions ranging from: poor hearing or complete deafness, poor vision or complete blindness, behavioral/temperament issues, cancers (predominately skin cancer), amongst others. White/Albino Dobermanns are actually a cream color with white markings, blue eyes, and pink nose. Although this is consistent with albinism, the proper characterization of the mutation is currently unknown. The animals are commonly known as tyrosinase-positive albinoids, lacking melanin in oculocutaneous structures. This condition is caused by a partial deletion in the SLC45A2 gene.
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