What to Do When Your Dog Is in Heat

Your dog's first heat can be surprising — bleeding, behavior changes, and male dogs suddenly appearing from everywhere. Understanding what's happening and how to manage it calmly makes all the difference for both of you.

This guide covers everything you need to know: from the first signs of estrus to the final days of the cycle. Whether you're a first-time owner or have been through this before, you'll find practical, vet-recommended advice to keep your dog safe and comfortable.

Signs Your Dog Is in Heat

Recognizing the early signs of heat helps you prepare and prevent unwanted pregnancy. The most common signs include:

Understanding the 4 Stages of Heat

The canine estrous cycle has four distinct phases. Knowing which stage your dog is in helps you predict fertility and manage care effectively.

1. Proestrus (7-10 days): The beginning of heat. The vulva swells, and bloody discharge appears. Males become interested, but the female is not yet receptive. She may act irritable or nervous. This is when you'll notice the most obvious signs.
2. Estrus (5-14 days): The fertile period. Discharge often becomes lighter in color (straw-colored or pink). The female is now receptive to males and will stand to be mounted. This is the time when pregnancy is possible. She may "flag" her tail to signal readiness.
3. Diestrus (60-90 days): If pregnancy occurs, this is the gestation period. If not pregnant, hormones begin to decline, the vulva returns to normal, and discharge stops. She is no longer receptive. Behavioral changes subside.
4. Anestrus (2-4 months): The resting phase between cycles. No hormonal activity. This is the typical period between heat cycles for most dogs. Use this time to plan for spaying or prepare for the next cycle.

How Long Does Heat Last?

The average heat cycle lasts 2 to 4 weeks (14-28 days). However, every dog is different. Here’s a typical breakdown:

• Bleeding phase: 7-10 days (proestrus). Bleeding may be heavy at first, then taper off.
• Receptive phase: 5-14 days (estrus). This is when she can get pregnant. Discharge often becomes lighter.
• Post-heat: 7-10 days. The vulva gradually returns to normal, and all signs disappear.
• Complete cycle: Average 21 days. Some large breeds may have longer cycles.

How to Care for a Dog in Heat

Your dog needs extra comfort and attention during this time. Here's how to keep her safe and relaxed:

Home Care Essentials

• Provide a quiet space: Set up a comfortable bed in a low-traffic area where she can rest undisturbed. Some dogs feel vulnerable and seek solitude.
• Maintain routine: Stick to her regular feeding, walking, and play schedule as much as possible. Consistency reduces stress.
• Keep her indoors: Never leave her outside unsupervised. Even well-fenced yards can be breached by determined male dogs. Always accompany her outside.
• Use a leash: When outside, keep her on a short leash at all times. Even well-trained dogs may be tempted to wander.
• Consider dog diapers: Washable or disposable diapers help manage discharge and protect furniture. Introduce them gradually with positive reinforcement.

Walking & Exercise During Heat

Exercise is still important, but you'll need to make adjustments. If you want to learn more about training and walking techniques, our guide on how to train your dog to walk on a leash offers helpful tips that apply even during this time. Also, consider using calming products to help her relax if she's particularly anxious.

Managing Bleeding & Discharge

Bleeding is normal during proestrus, but it can be messy. Here are practical solutions:

• Dog diapers: Reusable cloth diapers or disposable ones work well. Ensure they fit snugly but not too tight. Change them frequently to prevent skin irritation.
• Protect furniture: Cover beds, sofas, and floors with old towels or washable pet blankets. This saves you from constant cleaning.
• Clean with warm water: Wipe the vulva area gently with a warm, damp cloth if discharge becomes crusty. Pat dry — do not rub.
• Monitor for excessive bleeding: A small amount is normal. If bleeding is heavy, she appears weak, or you notice blood clots larger than a quarter, contact your vet immediately.

Behavior Changes & What to Expect

Hormonal shifts can cause significant behavioral changes. Here's what to look for and how to respond:

• Increased clinginess: Your dog may follow you everywhere and seek extra attention. This is normal. Provide reassurance with calm petting and gentle words.
• Irritability or aggression: Some dogs become grumpy, especially toward other female dogs. Give her space and avoid stressful interactions. You might also explore behavior modification techniques if she shows persistent aggression.
• Restlessness and pacing: She may pace, whine, or have trouble settling down. This is due to rising hormone levels. Provide chew toys or puzzle toys to keep her mind occupied.
• Urine marking: She may urinate more often and in more places to advertise her availability. Clean up accidents promptly with an enzymatic cleaner.

Spaying After Heat: Timing & Tips

If you plan to spay your dog, timing matters. It's generally recommended to wait until the cycle is fully over — about 2-3 months after the end of heat. This allows hormone levels to return to baseline, reducing surgical risk.

• Why wait? During heat, the uterus and surrounding blood vessels are enlarged, making surgery riskier. Waiting reduces complications.
• When to schedule: Most vets prefer to spay about 8-12 weeks after the cycle ends. Your vet will confirm the best timing based on your dog's health.
• Health benefits: Spaying eliminates the risk of uterine infections (pyometra) and reduces mammary cancer risk. Learn more about how long after a heat can a dog be spayed.

Frequently Asked Questions