What to Do When Your Dog Comes Into Season: A Complete Guide

What Does “Coming Into Season” Mean?

When a female dog comes into season, it means she is fertile and ready to mate. This typically happens for the first time around 6–12 months of age, depending on the breed. Smaller breeds may start earlier, while larger breeds may take longer. Dogs usually go into season twice a year, although this can vary.

Signs Your Dog Is in Heat

• Swelling of the vulva

• Bloody discharge (light at first, then heavier)

• Increased urination

• Changes in behaviour: your dog may become more affectionate or restless

• Interest from male dogs

How Long Does a Dog Stay in Heat?

A dog’s heat cycle lasts about 2–4 weeks, divided into four stages:

1. Proestrus – Swelling and discharge begin; males show interest, females usually reject mating.

2. Estrus – Female is fertile and receptive to males.

3. Diestrus – Female stops accepting males; pregnancy occurs if she’s mated.

4. Anestrus – Resting phase until the next cycle.

Understanding these stages can help you manage your dog’s safety and comfort during this time.

When to Consider Spaying

Spaying is a surgical procedure that removes a female dog’s ovaries and uterus, preventing her from becoming pregnant. It’s a routine operation that can be done safely by a veterinarian and is often recommended for dogs not intended for breeding.

Spaying not only prevents unwanted litters but can also reduce health risks such as uterine infections and certain cancers. It can also eliminate the stress of managing repeated heat cycles. Talk to your vet about the best timing for your dog, as this can vary depending on her age, breed, and overall health.

How We Help at Loz & Lula

Being prepared and understanding what to expect can make your dog’s heat cycle manageable. With the right care, attention, and supervision, you can ensure your pup stays safe, comfortable, and happy during this natural phase of her life.

At Loz & Lula, when you book any of our services—dog sitting, walking, or training—you also get practical advice and updates about your dog’s wellbeing. For example, I watch for changes in behaviour that might indicate your dog is coming into season and share these with you, helping first-time dog owners feel confident and prepared. We’re here to support you and your dog every step of the way, keeping you informed and giving you peace of mind.