Kybra Kennels Blog


How Long is a Dog in Heat


   Female dogs go into estrus or heat every six months. During this period, a female dog will be receptive to mating. You may also see certain differences in your dog that indicate her condition. These differences include:

• Swollen vulva

• Bleeding

• Increased frequency of urination

• Heightened alertness

   If you plan to breed your dog, it is a good idea to know the answers to questions about canine reproduction such as "how long is a dog in heat?" and "when do dogs start going into heat?" Consider the following:

When Do Dogs Start Going Into Heat?

This is often dependent on the size of the dog as smaller dogs tend to go into heat sooner than larger dogs. On average, the age of the first heat is about six months. Very large breeds may not see their first heat until the 18-month mark or even two years. Experts agree that it is a bad idea to breed dogs during their first estrus. This is because neither the dog nor her eggs are sufficiently mature. As a dog owner, you should consult with your vet to determine when your dog is mature enough to breed. 


How Long is a Dog in Heat?

Cycles tend to last between two and four weeks; however, a female dog may not be receptive to male dogs for the whole cycle. Receptivity can vary, so the question of how long is a dog in heat has to be answered on an individual basis. It is also important to consider the fact that the window of highest fertility is relatively small. It lasts about five days starting nine or ten days after the cycle starts. However, it is possible for her to become pregnant at any point in the cycle.

Will a Dog Go Into Heat for the Rest of Her Life?

It is a good idea to keep a record of when your dog starts cycling. While the first couple of cycles may be irregular, they will eventually become regular and may occur as often as four times a year with smaller breeds. Female dogs do experience estrus over their whole lives though the time between cycles will grow as she gets older.


For more information about dog’s being in heat, or to learn about our upcoming puppies, contact us today!

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