
When do Border Collies go into heat? Female border collies typically go into heat for the first time between the ages of 6 and 12 months. However, the exact timing can vary based on a number of factors, including the individual dog’s genetics and environment.
It is important for owners to be aware of the signs of heat in their female border collie, which can include changes in behavior, increased urination, and swelling of the vulva. By understanding when their dog is likely to go into heat and what to look for, owners can provide the best possible care for their pet.
Understanding the Heat Cycle in Border Collies
Border Collies, like all dogs, go through a heat cycle, also known as estrus. The heat cycle is a natural process that allows a female dog to reproduce. Understanding the heat cycle in Border Collies is important for their health and well-being.
The Heat Cycle
The heat cycle in Border Collies typically starts between 6 and 12 months of age. The cycle consists of four stages: proestrus, estrus, diestrus, and anestrus. Each stage has different physical and behavioral changes.
Proestrus
Proestrus is the first stage of the heat cycle and usually lasts for 9-10 days. During this stage, the female dog’s body is preparing for mating. The dog’s vulva will begin to swell, and she may have a bloody discharge. She may also become more irritable and restless.
Estrus
Estrus is the second stage of the heat cycle and lasts for 5-9 days. During this stage, the female dog is receptive to mating. Her vulva will be fully swollen, and she may have a more watery discharge. She may also become more affectionate and seek attention from male dogs.
Diestrus
Diestrus is the third stage of the heat cycle and lasts for around 60 days. During this stage, the female dog’s body is preparing for pregnancy. If the dog has not been mated, she will go through a false pregnancy. She may also become more protective and aggressive.
Anestrus
Anestrus is the final stage of the heat cycle and lasts for around 4 months. During this stage, the female dog’s body is in a resting phase. She will not go through a heat cycle during this time.
First Heat
A Border Collie’s first heat typically occurs between 6 and 12 months of age. It is important to note that a female dog should not be bred during her first heat cycle as her body is not fully developed.

First Heat in Border Collies
Female Border Collies usually reach sexual maturity and have their first heat cycle between the ages of four months and 18 months. The age at which a Border Collie has its first heat cycle can vary depending on the individual dog’s breed, size, and overall health.
A Border Collie’s first heat cycle is a significant milestone in its life, as it marks the beginning of its reproductive cycle. During this time, female Border Collies may experience changes in their behavior and physical appearance.
It’s important to note that while some Border Collies may have their first heat cycle at four months, it’s not uncommon for others to have their first heat cycle at 18 months. It’s essential to keep an eye on your Border Collie’s behavior and physical appearance to determine when it reaches sexual maturity.
Physical and Behavioral Changes
When a female Border Collie enters heat, there are various physical and behavioral changes that can occur. These changes are a result of hormonal fluctuations and can vary in intensity and duration.
One of the most noticeable physical changes is the swelling of the vulva, which can become quite pronounced. This swelling is usually accompanied by a bloody discharge, which can last for several days and is a sign that the dog is in estrus. During this time, the dog may also urinate more frequently than usual.
In addition to physical changes, there are also behavioral changes that can occur. Some dogs may become more agitated or anxious, while others may experience mood swings or aggression. It is important to keep a close eye on your dog during this time, as they may be more prone to escaping or exhibiting destructive behavior.
It is worth noting that not all Border Collies will exhibit the same physical and behavioral changes during heat. Some dogs may go through a “silent heat,” where they do not display any outward signs of being in estrus. However, even in these cases, it is important to keep your dog away from intact males to prevent unwanted breeding.
Health and Care During the Heat Cycle
Border collies typically go into heat twice a year, but this can vary depending on the individual dog. During this time, it’s important to provide your dog with extra care and attention to ensure their health and comfort.
One of the most important aspects of caring for your border collie during their heat cycle is maintaining their hygiene. This includes keeping their bedding and living area clean, as well as regularly cleaning your dog’s genital area to prevent infection.
It’s also important to monitor your dog’s behavior and physical health during this time. Signs of heat in border collies include increased urination, swelling of the vulva, and a change in behavior such as increased restlessness or aggression. If you notice any unusual symptoms or behaviors, it’s important to consult with a veterinarian.
In terms of diet, it’s important to provide your border collie with a healthy and balanced diet during their heat cycle. This can help prevent complications such as weight gain or digestive issues. Additionally, providing your dog with plenty of fresh water is crucial to their overall health and comfort.
Finally, it’s important to provide your border collie with extra comfort and attention during their heat cycle. This can include providing them with a comfortable place to rest, spending extra time playing and bonding with your dog, and providing them with toys or other forms of entertainment to keep them occupied. By taking these steps, you can help ensure your border collie stays healthy and comfortable during their heat cycle.

Breeding and Pregnancy
Border Collies typically go into heat twice a year, starting between the ages of 6 and 12 months. During this time, they are fertile and can become pregnant. If you are considering breeding your Border Collie, it is important to do so responsibly and with the guidance of a reputable breeder.
Breeding should only be done with healthy dogs that meet breed standards. It is important to consider the potential health risks and costs associated with breeding, as well as the time and effort required to properly care for the mother and puppies.
If you are not planning to breed your Border Collie, it is important to spay her to prevent unwanted pregnancies. Spaying also has health benefits, such as reducing the risk of certain cancers and infections.
During pregnancy, it is important to provide proper nutrition and veterinary care for the mother. The gestation period for dogs is approximately 63 days. It is important to monitor the mother’s health and behavior during this time, as well as prepare for the arrival of the puppies.
Breeding and pregnancy should always be approached with caution and responsibility. It is important to work with knowledgeable breeders and veterinarians to ensure the health and well-being of the dogs involved.
Precautions and Supervision
When your Border Collie goes into heat, it is important to take precautions and provide adequate supervision to ensure her safety and the safety of other dogs. During this time, your dog may become more receptive to male dogs, which can lead to unwanted breeding.
Leashing your dog during walks is highly recommended to prevent her from running off and potentially mating with a male dog. Additionally, it is important to avoid activities that may lead to accidental breeding, such as dog parks or off-leash areas.
Patience is key during this time, as your dog may experience mood changes and discomfort. Providing a comfortable space for her to rest and relax can help ease any discomfort she may be feeling.
If this is your dog’s first time going into heat, it is important to monitor her closely and seek veterinary advice if you notice any unusual behavior or symptoms.
The heat cycle typically lasts about three weeks, and it is important to keep your dog supervised and leashed during this time to prevent any unwanted breeding. By taking these precautions, you can ensure the safety and well-being of your Border Collie during her heat cycle.

Spaying Your Border Collie
Spaying your Border Collie is an important decision that should be made after careful consideration. Spaying is the surgical removal of the ovaries and uterus of a female dog, which prevents them from going into heat and eliminates the risk of unwanted pregnancy.
Benefits of Spaying Your Border Collie
Spaying your Border Collie has many benefits, including:
- Reducing the risk of breast cancer and uterine infections
- Preventing unwanted pregnancy
- Reducing the likelihood of behavioral problems associated with going into heat, such as aggression, restlessness, and howling
- Eliminating the need to manage your dog during their heat cycle, which can be time-consuming and stressful
When to Spay Your Border Collie
The ideal time to spay your Border Collie is between 6 to 12 months of age. However, the timing of spaying can vary depending on the breed, size, and overall health of your dog. It’s important to discuss the best time to spay your Border Collie with your veterinarian.
Spaying and Menopause
Spaying your Border Collie will prevent them from going into heat and eliminate the risk of unwanted pregnancy. However, it’s important to note that spaying does not cause menopause in dogs. Dogs do not experience menopause like humans do.
Spaying and Lifestyle
Spaying your Border Collie can have a positive impact on their lifestyle. It can reduce the risk of certain health issues and eliminate the behavioral issues associated with going into heat. It can also make it easier to manage your dog’s behavior and schedule.

Frequently Asked Questions
What age do Border Collies have their first season?
Border Collies usually have their first season between the ages of 6 months to 1 year. However, the age can vary depending on the individual dog and breed. It is important to keep in mind that early spaying or neutering can delay the onset of the first season.
How often does a Border Collie go into heat?
Border Collies usually go into heat twice a year, with each heat cycle lasting about 3 weeks. However, this can vary depending on the individual dog and breed.
How long does a Border Collie’s first heat last?
A Border Collie’s first heat usually lasts around 2 to 3 weeks. However, it can vary from dog to dog.
What are the early signs of a dog coming into season?
The early signs of a dog coming into season include swelling of the vulva, increased licking of the genital area, and changes in behavior such as restlessness or aggression.
What are the symptoms of a Border Collie in heat?
The symptoms of a Border Collie in heat include vaginal bleeding, increased urination, and changes in behavior such as restlessness or aggression.
How do I know if my Border Collie is on heat?
You can tell if your Border Collie is on heat by observing the symptoms mentioned above, such as vaginal bleeding and increased urination. It is important to keep your dog away from male dogs during this time to prevent unwanted breeding.