When Does First Heat Cycle Usually Begin?

James Glover
by James Glover
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QuestionI have a shihtzu. In february she will be a year old. When do these dogs usually come into heat for the first time? (Lori Erickson - Minnesota)

Answer

First heat can vary greatly dog to dog. The youngest is about six months of age though sometimes a female will come into season younger. First heat can start as late as 12 or even 14 months of age or later in rare cases. Again, it can vary dog to dog. Spaying at six months is recommended before a female begins to enter sexual maturity. Some vets will spay younger and spaying of puppies as young as eight weeks old who are up for adoption in shelters is becoming more popular.

Disclaimer: This service is meant to provide advice only and is not meant to replace an appointment with a registered veterinarian. Users should always seek a second opinion. Unfortunately we are only able to answer several questions per week so not everyone gets a published answer. And, unfortunately we can't answer by email.
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