The first week with a rescue dog

You bring home a dog you know little about, and it knows even less about you. The first days will define the relationship for months, and nearly everything people do out of affection in that week is counterproductive. This is about what to do and, above all, what not to do.

The 3-3-3 rule

It is the reference nearly every shelter uses, and it describes well what happens:

Three days for the initial stress to come down. The dog is overwhelmed. It hides, or refuses food, or sleeps eighteen hours, or follows you everywhere. None of this predicts anything.

Three weeks to understand the household routine and start showing its real character. This is when both the virtues and the problems you had not seen appear: separation anxiety, reactivity towards other dogs, fear of one particular noise.

Three months to feel at home. The technical word is bonding, and it cannot be forced.

The numbers are indicative, and for deeply traumatised dogs they run short. But the shape of the curve is that shape, and knowing it prevents the rushed first-week conclusion: "this dog is not what I expected."

The three commonest mistakes

Introducing it to everyone. The family, the neighbours, the friends who want to meet it. It is the most natural thing in the world and the worst thing you can do in the first days. An animal that does not yet know whether it is safe does not need fifteen strangers: it needs boredom.

Smothering it with affection. Hugs, pats on the head, picking it up. A human hug is, in canine language, a restraint. Let the dog be the one to approach, and stroke the chest or the flank before the head.

Taking it on a long walk the first day. Five minutes along a quiet street are enough. An hour through a noisy city centre on day one is sensory overload that contributes nothing.

What to do instead

Limit the space. Do not hand over the whole house. One room or one zone with its bed, its water and a blanket, from which it can observe without being exposed. Freedom expands as the dog relaxes — not the other way round.

Set the routine from minute one. Same meal time, same outings, same sleeping place. Predictability is what lowers stress, far more than any affection.

Lead on at all times, indoors too, in the first days. A frightened dog slips through an open door with astonishing ease, and the first week is when most escapes happen. An escape-proof harness and a short lead — and check that the ID tag and the microchip details are current before the first outing.

Feed it what it was already eating. The shelter will tell you what. A change of food on moving day is the guaranteed recipe for a diarrhoea you will then misread as a health problem.

What is not a bad omen

These things frighten people and are normal in the first week:

• Not eating for a day or two. Watch the water; the food will return.
• Mild diarrhoea. Stress and a changed routine. If it lasts more than two days, or there is blood, see the vet.
• Hiding under furniture. Leave it. Do not drag it out.
• Marking indoors. Even if it never did at the shelter. It is new territory.
• Growling when you approach its food. That is information, not a threat. Do not punish it: give space, and work on it calmly later.

What does require immediate consultation: not drinking, repeated vomiting, deep apathy with pale gums, or any sign of pain.

The piece almost nobody plans

Going back to work. Many people adopt on a Friday, spend the whole weekend with the animal, and on Monday vanish for ten hours. For a dog three days into an unknown house, that is exactly the scenario that triggers separation anxiety.

What works is the boring thing: leaving it alone from the first day, in very short stretches — five minutes, fifteen, half an hour — with no ceremony on the way out or the way back. And if your schedule does not allow that progression, delegate it. A midday walk during the first weeks turns a ten-hour absence into two five-hour halves — an enormous difference for an animal that does not yet trust that you are coming back.

Talk to the shelter afterwards, not only before

A widespread mistake: treating adoption as a transaction that ends on handover day. The shelter's people lived with that animal for weeks or months and know things no record card holds — that it sleeps better with a light on, that the shopping trolley scares it, that it gets on with big dogs and not with small ones.

Write to them on day three and tell them what you are seeing. Not to ask permission, but because they will save you weeks of trial and error. And if something is going clearly worse than expected, say so early: nearly all of them would rather help you solve it than take back a returned dog two months later.

And about the surroundings

Where you live conditions this first phase considerably. In a city like Barcelona, with narrow pavements and heavy foot traffic, seek out the quiet hours and the Collserola tracks for the first outings. In Valladolid — or any city with river corridors — the waterside paths are ideal: long, flat, free of crossings and nearly empty at first light.

Choosing those first routes well is not an aesthetic detail. A dog whose first memory of the street is a main avenue at eight in the evening will take far longer to find it bearable.