First night & first week home: a settling-in schedule (+ the 3-3-3 rule)

The dog you bring home on day one is not the dog you will have at week four. This is the single most important thing to understand before adopting. A dog entering a new home — especially a rescue with an unknown or difficult history — is under significant physiological stress. Their cortisol (stress hormone) levels are elevated, their immune function is suppressed, and their behaviour in the first days reflects that stress state, not their true personality.

What looks like calmness might be shutdown. What looks like aggression might be fear. What looks like perfect behaviour might be an exhausted dog who is simply overwhelmed. Give them time. The first week is about decompression, safety and gentle routine — not training, not socialising, and not introducing them to all your friends.

The science: why dogs need decompression time

Research in applied animal behaviour science has documented that many newly rehomed dogs show elevated cortisol, reduced appetite, disturbed sleep, and altered social behaviour for days to weeks after placement. A 2018 study by Herron, Lord and Reisner published in Applied Animal Behaviour Science found that shelter dogs in new homes continued to show behavioural changes consistent with adjustment stress for a mean of 4–6 weeks. The decompression framework acknowledges this biology rather than fighting it.

Hour 1: the arrival

Bring your dog directly to their designated safe area — the room or space you have set up in advance with crate, bed, water and familiar-smelling bedding (if available from the rescue). Keep the environment quiet. Cancel any visitors for at least 24 hours. Let the dog explore the space at their own pace without being followed, cooed at, or picked up.

• Take the dog for a calm toilet walk before entering the flat.
• Enter the flat quietly — no excited voices or music.
• Offer water immediately; hold off on food for 30–60 minutes.
• Sit calmly in the same room. Do not approach; let the dog come to you.
• If the dog hides under a bed or behind furniture, leave them. This is normal stress behaviour, not rejection.

Hours 2–6: the first feed and the first nap

• Offer a small first meal — half the normal portion if the dog seems stressed, as stress suppresses appetite and can cause vomiting.
• Take another toilet trip 10 minutes after eating.
• Encourage rest: place a worn item of your clothing near the dog's bed to provide a familiar scent anchor.
• Keep activity low: no play sessions, no introductions, no handling beyond what is necessary.
• If you have children, brief them firmly before arrival: quiet voices, no running near the dog, no picking up.

Night one: what to expect and how to manage it

Most dogs — puppies especially, but also newly adopted adults — will struggle on the first night. They are in an unfamiliar environment without the animals or people they have been sleeping near. Expect vocalisation: whining, pacing, or barking. This is normal anxiety, not bad behaviour.

• Place the crate in your bedroom or as close to your bed as practical. The sound and scent of your breathing genuinely reduces a dog's overnight stress response.
• Do not respond to whining by releasing the dog from the crate — this teaches whining as a release mechanism. Wait for a pause of at least a few seconds before any response.
• For puppies: expect 2–3 overnight toilet trips. A puppy under 12 weeks cannot reliably hold their bladder for more than 2–3 hours.
• A warm (not hot) water bottle wrapped in a blanket in the crate mimics the body heat of a littermate.
• If the noise is truly extreme and persistent, sit quietly near the crate and speak softly — do not open it, but your presence may be enough to settle.

Days 2–7: the settling-in schedule

For the first week, maintain a simple, predictable routine. Dogs find comfort in regularity: meals at consistent times, toilet trips at predictable intervals, and calm handling. Resist the impulse to accelerate socialisation, training or introductions. The goal of week one is for the dog to learn that this environment is safe.

• Morning: toilet trip on waking, then breakfast, then a short calm walk (20–30 minutes).
• Midday: rest period in the crate or safe area; a chew item or lick mat for mental engagement.
• Afternoon: another toilet trip and short walk or calm garden time.
• Evening: dinner at a fixed time; a calm interaction session (quiet petting, gentle play if the dog initiates).
• Night: toilet trip before bed; settle in crate.

Introducing other pets and household members

Keep introductions minimal in week one. Introduce one person at a time, calmly and without crouching over the dog. If you have an existing dog, do initial introductions on neutral territory (outside the flat, on a walk) rather than in the home — this dramatically reduces territorial tension. Cat introductions should be fully managed: keep the new dog on a leash, give the cat an escape route, and never force proximity. Multiple short sessions over several days are better than one long one.

Red flags to watch for in week one

• Not eating or drinking for more than 24 hours: contact your vet.
• Persistent vomiting or diarrhoea (more than 2–3 episodes): contact your vet — this can indicate stress colitis or a pre-existing illness.
• Extreme lethargy or inability to stand: emergency vet visit immediately.
• Growling or snapping when touched in a specific area: may indicate pain or injury; contact your vet.
• Inability to urinate or pass stool for more than 24 hours: contact your vet.