Chang-Young  Fei, I. Feng  Yen, Shawn Jen-Lung  Peng, Wallace  Ryan, Chyao  Chung-Huai, Kwong-Chung  Tung, 
    Low Sterilization of Pets Causes Shelter Overpopulation,
    Journal of Animal and Veterinary Advances,
    Volume 13,Issue 16,
    2014,
    Pages 1022-1026,
    ISSN 1680-5593,
    javaa.2014.1022.1026,
    (https://makhillpublications.co/view-article.php?doi=javaa.2014.1022.1026)
    Abstract: This study reported the acquisition and the sterilization 
  rate of household dogs surveyed in 2009 at Taiwan. Six modes of dog acquisition 
  were included in the survey: obtained by a friend/relative (42.1%) bought from 
  pet shop (23.7%) found as a stray (21.0%) born by my dogs (6.0%) adopted at 
  animal shelters (3.2%) and others (3.9%). The sterilization rate of household 
  dogs in the survey was 32.7%. Using the data of this survey and others of analogous 
  published study to run regression analysis, a negative correlation was presented 
  between the rate of the acquisition obtained by a friend/relative and the rate 
  of the sterilization rate of household dogs. The regression equation is: y = 
  -0.3761x+0.571; R<SUP>2</SUP> = 0.8926. Results in this report support the recommendations 
  that the sterilization of household dogs can decrease the shelter intake of 
  unpredicted unwanted dogs.
    Keywords: Household dogs;Household dogs;Household dogs;shelter;overpopulation