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A 16 month old boxer that has not had her first heat may have some type of medical problem, such as an underactive thyroid. It is also possible that she has had a "silent heat," which means that she did come into heat but showed very few signs of it. A silent heat is very easy to miss but is perfectly normal.

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10y ago

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It is not uncommon for some dogs, particularly larger breeds like boxers, to have their first heat cycle after 16 months of age. Factors such as genetics, environment, and overall health can influence the timing of a dog's first heat cycle. If you have concerns about your boxer's reproductive health, it is best to consult with your veterinarian for personalized advice.

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9mo ago
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Q: Why hasn't my 16 month old boxer not had her first heat?
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