How many days does a dog's second heat last? - briefly
The duration of a dog's second heat cycle typically lasts about 9 to 15 days.
How many days does a dog's second heat last? - in detail
The duration of a dog's second heat cycle can vary depending on several factors such as breed, size, and individual differences. However, on average, the second heat cycle in dogs typically lasts for about 18-21 days. This period is divided into four distinct phases: proestrus, estrus, diestrus, and anestrus.
During the proestrus phase, which usually lasts for 9-10 days, the dog's body prepares for ovulation. This stage is characterized by swelling of the vulva and a bloody discharge. The estrus phase, often referred to as the "heat" period, follows next and typically lasts for about 5-7 days. During this time, the dog becomes receptive to mating and will allow male dogs to mount her.
After the estrus phase, the diestrus phase begins and can last for approximately 60-90 days. This stage is marked by a decrease in hormone levels and a return to normal reproductive health. Finally, the anestrus phase occurs, during which the dog's reproductive system remains inactive until the next heat cycle.
It is important to note that smaller breeds may have shorter heat cycles, while larger breeds may experience longer cycles. Additionally, some dogs may not follow this typical pattern and can exhibit variations in their heat cycle duration. If you notice any unusual or concerning changes during your dog's heat cycle, it is recommended to consult with a veterinarian for professional advice tailored to your pet's specific needs.