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  That is giving only one litter as an example, but as each new one comes along, the point is proved. No two puppies are ever exactly alike, either in physical qualities or in temperament; yet the laws of heredity are demonstrated in each one.

 For instance, the sire of this litter was light boned, but all the puppies were heavy, like their mother. On the other hand, the dam had much less to do with their color. Although she was golden herself, her sire—the grand-sire of the puppies—was black. They inherited short bodies from the dam, while the predominating features of their dispositions appeared to come from the sire.

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  However, to draw any important conclusions from this mating would require repeating it many times, and keeping careful-records of the results. Some day it is my ambition to line breed a dog and bitch, and then at every opportunity to breed this same pair, keeping records from start to finish. In this way, I shall have a chance to observe the laws of heredity actually at work. But that is for the future. For the present, like most other breeders, I must rely on the invaluable work which has been done by investigators such as Mendel and Morgan.

  For instance, the sire of this litter was light boned, but all the puppies were heavy, like their mother. On the other hand, the dam had much less to do with their color. Although she was golden herself, her sire—the grand-sire of the puppies—was black. They inherited short bodies from the dam, while the predominating features of their dispositions appeared to come from the sire.

  However, to draw any important conclusions from this mating would require repeating it many times, and keeping careful-records of the results. Some day it is my ambition to line breed a dog and bitch, and then at every opportunity to breed this same pair, keeping records from start to finish. In this way, I shall have a chance to observe the laws of heredity actually at work. But that is for the future. For the present, like most other breeders, I must rely on the invaluable work which has been done by investigators such as Mendel and Morgan.

  It has been said that a little knowledge is a dangerous thing. That is as true in dog breeding as in anything else. A little knowledge may be dangerous, but if that little is balanced with common sense, a great deal may be accomplished. It will create a desire to know more, and the person who is willing to study this fascinating science will always be rewarded by finding something new.

  It is impossible here to discuss the anatomy of dogs. It would be well, however, for the prospective breeder to acquire some knowledge along these lines before he attempts to produce his first litter. He should have a general knowledge of a dog's anatomy, and how the vital organs function. Then he will be able to understand his own limitations, and when they are reached, he will call in a veterinarian before any harm is done.
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