Dog Heat Symptoms

Do you know much about dog heat symptoms? If you own an unspayed female, this information can be very important to managing her reproductive cycle. Learn what you need to know right here.

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To better understand the many symptoms of the dog heat cycle, it's best to break down the various stages of the average 21 day heat cycle. Doing so can help you determine which part of the heat cycle your bitch is in, and it can also help in planning or preventing a litter.

Proestrus is the term used to describe the initial portion of the heat cycle. This period can last from seven to ten days, but many bitches typically experience about nine days in proestrus.

During this time, you'll notice many but perhaps not all of the following dog heat symptoms.

• A personality change: Changes can range from quite mild to more severe. Sometimes a bitch will become more affectionate and clingy with her owner, other times she may seem a bit standoffish or grumpy. Some bitches act directly in opposition to their usual character, while others simply augment their natural personality.
• Appetite changes: It's not unusual for a bitch to go off her food a bit during this first week of the estrus cycle, although more rarely a bitch becomes hungrier to the point of raiding the trash bin for discarded leftovers. Whatever the change is, taking note of it can be a significant clue that the heat cycle has begun.
• Swelling of the vulva: The amount of vulva swelling varies from one bitch to the next. Some dogs swell ever so slightly, while others swell quite a lot. As the swelling progresses, it is not only noticeable from the vulva itself, but can also be seen trailing up to the pelvic opening just below the anus.
• Bloody discharge from the vulva: The amount of bleeding also varies, but typically bleeding is light during the first few days and grows a bit heavier mid-week.
• Tail tucking: This is a tendency to guard the vulva, either by tucking the tail between the leg or sitting down whenever another dog approaches the immediate area.

The onset of estrus marks the fertile portion in a bitch's heat cycle where the ovaries begin to release eggs for fertilization.

During this period, dog heat symptoms include:

• Lightened discharge: Previously bright red, the discharge now lightens to a pinkish-tan stain.
• Softening of the vulva: Initial swelling subsides just enough to make the vulva soften enough for penetration.
• Tail flagging and flirting: Whereas a bitch may previously have tucked her tail to fend off a male's advances, she now begins to behave flirtatiously. This can include inviting the male to mount by turning her rear toward him and holding the tail high and out of the way. She will fan it lightly to make sure he catches her scent. If conditions are truly right, a full mating may take place.

As diestrus takes over, the fertile portion of the heat cycle comes to an end.

Signs of the end of the cycle include:

• Gradual disappearance of vulva swelling: Most of the swelling is gone within one week's time, but the vulva may remain slightly enlarged after the first heat cycle has taken place.
• Cessation of flirting: Whether bred or not, the bitch now lacks the conditions to mate and is no longer interested in flirting.
• Gradual cessation of discharge: The pinkish-tan discharge of estrus once again turns red, but now tapers off over the course of the final week.

Diestrus can be extended to encompass the 63 day period of the average canine pregnancy if a breeding was successful.

Providing no pregnancy results from a breeding during the heat cycle, the bitch goes back into anestrus. This is the five to eleven month period of inactivity that eventually cycles back into proestrus to begin the cycle anew.

If you'd like to learn more, progress to Dogs Mating..

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