Why Do Dogs Sniff Each Other's Butts? Understanding Canine Behaviour

In this guide

It looks undignified to us, but rear end sniffing is one of the most information rich greetings in the canine world, drawing on scent glands humans cannot detect at all.

The Science Behind It

Dogs have anal glands that produce a unique scent, almost like an individual signature. This scent can convey a remarkable amount, including sex, age, health status, diet, and even emotional state, all gathered in a few seconds of sniffing.

A Normal, Important Greeting Ritual

For dogs, this is simply a standard way of learning about a new individual, similar to how people might exchange names and a little small talk on first meeting. It is not something to interrupt or discourage as bad manners.

Reading the Interaction

Watch the wider body language during the sniff, not just the sniffing itself. Loose, relaxed bodies on both dogs suggests a comfortable greeting. Stiffness, a raised tail held high and rigid, or a dog trying to spin away and avoid being sniffed can signal discomfort, and is worth watching closely, especially with an unfamiliar street dog.

When to Intervene

Most greetings resolve naturally within moments. Step in calmly if either dog becomes stiff, growls, or tries repeatedly to escape the interaction, by calling your dog away rather than reaching into the middle of two dogs.

A Practical Note for Indian Walks

Unneutered street dogs and community dogs are common in many Indian neighbourhoods, and greetings between them and a leashed pet dog should always be supervised carefully. A confident, well socialised dog can usually navigate a brief greeting safely, but keep some distance from any dog showing tense or defensive body language rather than allowing a full greeting.

Leash Greeting Etiquette

Keep initial greetings brief, around three seconds, then call your dog away before either dog has a chance to become overwhelmed or fixated. A tight, tense leash during a greeting can itself create tension that would not otherwise be there, so keep the leash as loose as safely possible while both dogs check each other out.

A Quick Hygiene Note

After a greeting sniff between dogs, a quick wipe of the muzzle with a pet safe wipe before your dog greets a person or gets back in the car is a simple, sensible hygiene habit, particularly relevant after interactions with unfamiliar street dogs.

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