Dog in Heat? Here’s What to Expect – Vet’s Guide to Canine Estrus 2025 💌🐶 

By Dr. Duncan Houston BVSc

💌 Introduction: What Does “In Heat” Mean?

When a female dog is in heat, it means she’s entered estrus—the stage of her reproductive cycle when she’s fertile and may seek or attract male dogs. As a veterinarian, I help pet parents navigate this natural but sometimes stressful phase with the right care and expectations. 🐾

This guide explains:

• ✅ How to tell if your dog is in heat
• 👪 What the heat cycle includes
• 🚑 How to keep your pup safe and comfortable
• 🔹 How Ask A Vet,

1. Signs Your Dog Is in Heat ⚡

• 💧 Swelling of the vulva and bloody discharge
• 🐕 Increased urination and scent-marking
• 😋 Behavioral shifts: clinginess, anxiety, or restlessness
• 🐾 Attracting attention from intact male dogs

Signs may be subtle during the first cycle, which often occurs between 6–12 months of age.

2. Understanding the Estrus Cycle 📆

• Proestrus (7–10 days): Discharge begins, but females are not yet receptive
• Estrus (5–10 days): Fertile phase—female may seek males
• Diestrus (70–90 days): Hormone shift; pregnancy or return to normal
• Anestrus (3–5 months): Inactive resting phase between cycles

Vet Tip: Heat cycles repeat every 6–8 months unless the dog is spayed. 📊

3. Heat Care Tips from a Vet 😌

• 🚷 Avoid off-leash walks—intact males may follow scent trails
• 🎵 Use washable doggie diapers to manage mess
• 📦 Create a quiet, comfy space to help soothe mood swings
• 🧸 Distract with training games 

It’s okay to postpone bathing, vet visits, or boarding until your dog is no longer in estrus.

4. How Ask A Vet 🚀

• 🧑⚕️ Ask A Vet: Talk to a vet about hormone changes, spotting, or cycle length

5. Final Thoughts from Dr. Duncan Houston BVSc 👨⚕️

Being in heat is a natural part of your dog’s life, but it can bring behavioral, physical, and emotional changes. With calm guidance, structure, and the right tools, you can support her every step of the way. ✨

For ongoing care, Ask A Vet is your expert resource,

Warmly,
Dr. Duncan Houston BVSc

🔗 Visit AskAVet.com and download the Ask A Vet app to track heat cycles, talk with vets, and support your dog’s hormonal health every season.