Dog Heat Cycle Calculator
Track and predict your female dog's reproductive cycle for better care and breeding planning.
The average canine heat cycle occurs every 6-12 months and lasts 2-4 weeks.
Canine Reproductive Guide
Small Breeds
- First heat: 6-12 months old
- Cycle frequency: Every 4-6 months
- Often more obvious signs
- May have irregular cycles initially
Large/Giant Breeds
- First heat: 12-24 months old
- Cycle frequency: Every 8-12 months
- More subtle signs sometimes
- Generally more regular cycles
Important: Breeding before the 3rd heat cycle (or before 2 years for large breeds) is not recommended for optimal health.
Risks of Intact Females
- Pyometra (life-threatening uterine infection)
- Mammary cancer risk increases with each heat
- False pregnancies common after heat
- Behavioral changes during cycles
Preventative Care
- Track all heat cycles carefully
- Consider spaying if not breeding
- Watch for abnormal discharge
- Maintain ideal body weight
Quick Tools
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Heat Cycle Warning Signs
- Black/green discharge (possible infection)
- Excessive licking (may indicate discomfort)
- Lethargy/loss of appetite
- Heat lasting over 4 weeks