Small terrier

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Unexpected changes in the appearance of animals, including unusual size, scabies, feces tail or other characteristic features, are the result of genetic mutations that occur naturally at all times. Mutations that people like are then tried to keep to the greatest extent possible. Lyons explains that each animal has a defined “basic plan of the physical body structure, and when the mutation happens, people choose those who are their own favorite”. The introduction of most cat breeds has been accelerating only in the past 75 years, and dog breeds have been developing for centuries, as verified by Elaine Ostrander, chief researcher at the Department of Cancer Genetics and Comparative Genomics at the National Institute of Health ).
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