How Long Does a Dog’s Heat Last? Stages, Symptoms and What to Expect
What Is the Heat Cycle in Dogs?
The heat cycle, also called estrus, is the fertile period in a female dog’s reproductive cycle. During this time, she becomes attractive to males and can get pregnant. The full cycle has four phases, but “heat” is the most noticeable one to owners.
How Long Does Heat Last?
On average, a dog’s heat lasts 2 to 4 weeks. The duration varies based on breed, age, and individual differences. The cycle includes four phases:
1. Proestrus – 7 to 10 days
Bloody discharge appears, the vulva swells, and the dog attracts males but won’t accept mating yet.
2. Estrus – 5 to 14 days
This is the fertile phase when mating can occur. Discharge becomes lighter in colour, and the dog becomes receptive to males.
3. Diestrus – around 2 months
Post-heat phase. The dog is no longer fertile, but hormonal changes may simulate pregnancy (false pregnancy).
4. Anestrus – 3 to 4 months
This is the resting period before the next cycle. Hormone levels return to normal.
How Often Does a Dog Go into Heat?
Most female dogs go into heat twice a year. Some breeds, like Basenjis, may only cycle once per year. The first heat typically occurs between 6 and 12 months of age.
Common Signs of Heat
- Bloody or pinkish vaginal discharge
- Swollen vulva
- Frequent licking of the genital area
- Behaviour changes – restlessness, clinginess, or irritability
- Increased interest from male dogs
How to Care for a Dog in Heat
- Always keep her on a leash outdoors – to avoid unwanted mating
- Use protective dog pants indoors – to manage discharge
- Monitor her behaviour closely – excessive panting, anxiety, or lethargy may need vet attention
- Maintain hygiene – wash bedding and clean her space more often
Does Spaying Stop the Heat Cycle?
Yes. Spaying permanently ends the heat cycle and prevents pregnancy. It also reduces the risk of reproductive cancers and pyometra. Speak to your vet about the best timing, usually before or shortly after the first heat.
Conclusion
The heat cycle is a natural part of every female dog’s life. With knowledge and the right care, you can help her through it comfortably. And if you’re not planning to breed – spaying is a safe and responsible choice. 🐶🩸