Most all have to be spayed at some point anyway due to some emergency or other or health problem because they weren't spayed sooner eventually but doesn't just stop. A female who isn't spayed has approx. 40% the life span of a spayed female because they weren't spayed and developed health issues or complications from breeding ect. If a female isn't spayed, at some point there will be a problem that is a direct result like pyometra or metritis, mammary cancer, polyp are a few extremely common ones as well as any breeding or potential to is always a huge risk of their life and health.
http://www.irvinevetservices.com/education_spaying.php
q8109890.html#a2049467
http://www.dogfoodanalysis.com/dog_food_reviews/
http://www.bornfreeusa.org/facts.php?more=1&p=359
http://www.terrificpets.com/forum/57502.asp
http://www.irvinevetservices.com/education_spaying.php
q8109890.html#a2049467
http://www.dogfoodanalysis.com/dog_food_reviews/
http://www.bornfreeusa.org/facts.php?more=1&p=359
http://www.terrificpets.com/forum/57502.asp
