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					Originally Posted by Lovetodream88  Small dogs are full grown normally by 8 months. When a female is spayed before their first heat their mammarys are not formed so there is no chance of mammary cancer but after that first heat they form and after every heat the chance of mammary cancer or tumor goes up significantly. It is much better to spay before their first heat. There also can be behavior issues like two unspayed females together can become very aggressive with each other. After every heat the chance of poymentra goes up and that's very often deadly. | 
 
  So the best time to spay would be around 6 months?