Common Behaviours of a Female Dog in Heat

In this guide

The physical signs get most of the attention, but the behaviour changes are often what owners notice first.

When an unspayed female dog comes into heat, hormonal shifts drive a fairly predictable set of behaviours alongside the more obvious physical signs like swelling and discharge. Recognising these early helps you manage her safely, especially in India where free-roaming intact males near most neighbourhoods make an unsupervised heat cycle a real pregnancy risk.

Early Signs (Proestrus)

• A swollen vulva, often the very first visible sign.
• Light spotting or bloody discharge, which she may try to clean up herself.
• Increased urination, sometimes with a tendency to mark more frequently or in new spots, as her scent signals fertility to nearby males.
• Restlessness, clinginess, or occasionally mild irritability.
• Attracting male dogs from the neighbourhood even though she is not yet receptive to mating and may actively rebuff them.

Once She Becomes Receptive (Estrus)

• Discharge often lightens in colour and reduces in volume.
• She begins "flagging", holding her tail to one side when touched near the rear, a classic sign of receptivity.
• She becomes noticeably more interested in male dogs and may actively seek them out.
• Some dogs become more affectionate or clingy with their human family during this stage; others seem distracted and eager to roam.

Managing a Female in Heat Safely

• Keep her leashed and supervised on every outing, since even a few unsupervised minutes near an intact male is enough.
• Use well-fitted dog diapers indoors to manage discharge and protect furniture or flooring.
• Avoid dog parks, communal building compounds, or group walks during this window.
• Keep male dogs, including other pets in a multi-dog household, separated for the full three-week cycle, not just the days she seems obviously receptive.
• Watch for signs of discomfort, unusually heavy bleeding, or a foul smell, which can point to an infection rather than a normal heat.

A Note on Street Dogs and Community Management

Many Indian neighbourhoods have community or street dogs that go through heat cycles without any human oversight, which is part of why unmanaged litters remain common in urban and semi-urban India. Supporting a local Animal Birth Control programme, run under the Animal Welfare Board of India's guidelines, is one of the more effective ways residents can help reduce unplanned litters and the health risks that come with them for community dogs.

Frequently Asked Questions

How can I tell if my dog is in heat versus just unwell? Heat comes with a swollen vulva and cyclical discharge without fever or lethargy; if she seems genuinely sick, in pain, or the discharge smells foul, see a vet rather than assuming it is a normal cycle.

Can a female get pregnant on the very first day of heat? It is unlikely on day one, since she typically is not fertile until later in the cycle, but timing varies enough between individual dogs that keeping her separated from males for the entire heat is the only safe approach.

Do spayed female dogs still show any of these behaviours? No. Spaying removes the ovaries and uterus, which stops heat cycles and the behaviours tied to them, permanently.

Article content © S Vejay Anand. All rights reserved.