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  2. Estrous cycle - Wikipedia

    en.wikipedia.org/wiki/Estrous_cycle

    A female dog is usually diestrous (goes into heat typically twice per year), although some breeds typically have one or three cycles per year. The proestrus is relatively long at 5 to 9 days, while the estrus may last 4 to 13 days, with a diestrus of 60 days followed by about 90 to 150 days of anestrus.

  3. Canine reproduction - Wikipedia

    en.wikipedia.org/wiki/Canine_reproduction

    During proestrus and estrus, females may have a clear, blood tinged, or bloody discharge. Dogs during these stages are often informally referred to as being in heat. The length of these cycles varies greatly among breeds and even between individuals of the same breed. Proestrus and estrus can last anywhere from 5 days to 21 days. [5] 3.

  4. Frenetic random activity periods - Wikipedia

    en.wikipedia.org/wiki/Frenetic_Random_Activity...

    Frenetic random activity periods (FRAPs), also colloquially known as zoomies, scrumbling or midnight crazies, [1] are random bursts of energy occurring in dogs and cats in which they run frenetically, commonly in circles. They usually last a few minutes or less.

  5. Why Do Dogs Make Circles Before They Finally Lie Down? - AOL

    www.aol.com/why-dogs-circles-finally-lie...

    Dogs may not discriminate regarding food, but they sure can be picky about where they lie down. If you have a dog, you’ve probably seen it yourself. They find a spot to hunker down but don’t ...

  6. Canidae - Wikipedia

    en.wikipedia.org/wiki/Canidae

    Domestic dogs and certain small canids in captivity may come into oestrus more often, perhaps because the photoperiod stimulus breaks down under conditions of artificial lighting. [45] Canids have an oestrus period of 1 to 20 days, lasting one week in most species. [48] The size of a litter varies, with from one to 16 or more pups being born.

  7. Why Has My Dog's Behavior Suddenly Changed? An Expert ... - AOL

    www.aol.com/why-dogs-behavior-suddenly-changed...

    5. Provide Stress Relief. In addition to preventing access to triggering events, you can help relieve some stress by using calming aids.There are a variety of calming aids on the market nowadays.

  8. 10 things you likely didn't know about dogs' tails - AOL

    www.aol.com/news/2015-01-01-10-things-you-likely...

    Dogs exhibiting the happy right variety are deemed approachable, while the lefty waggers are not. Number 4: Tail shaking is an acquired skill. Puppies begin to learn the ins and outs of it when ...

  9. Menstruation (mammal) - Wikipedia

    en.wikipedia.org/wiki/Menstruation_(mammal)

    Many zoologists regard this as different from a "true" menstrual cycle. Female domestic animals used for breeding—for example dogs, pigs, cattle, or horses—are monitored for physical signs of an estrous cycle period, which indicates that the animal is ready for insemination.