Just Got a New Dog? Here's Exactly What to Do First

You just brought a new dog home — congratulations, and take a breath. The best thing you can do in the first hours is less than you’d think: the first day is about calm and space, not bonding, and a low-key start is what helps a new dog learn to trust you. This is the plan for the first day and week, including the 3-3-3 settling timeline, introductions, and what’s normal versus a reason to call the vet. For the whole first-month picture — supplies, feeding, safety — start at our new-dog hub; this guide is the acute “what do I do right now?” version.

Before they walk in: the 10-minute setup

If you can, get set up before your dog arrives. You need a quiet space that’s theirs, a crate or bed, food and water bowls, the food they’re already eating (ask the breeder or shelter — switching food on top of moving stress is a recipe for an upset stomach), a collar with an ID tag, a lead, and poo bags. Just as important, dog-proof the areas they’ll use: tuck away wires, move toxic plants and any human food off low surfaces, and set up baby gates so they can’t bolt upstairs or out a door. Our new-puppy checklist has the full shopping-and-setup list if you’re still getting ready.

The first day: keep it small

Bring your dog straight home — no pet-store detour, no showing them off to the neighbourhood. When you arrive, take them to the spot you want them to use as a toilet and give them a chance to go, then let them explore one calm room at their own pace rather than the whole house at once. Skip the welcome party; a crowd of excited people leaning over a nervous dog is overwhelming, not fun.

Offer water and a little of their usual food, but don’t worry if they ignore it today. Let them come to you instead of reaching for them, sit on the floor and let them investigate, and keep your voice low and your movements slow. The single most useful thing you can do is start the routine you actually want from hour one — where they sleep, where they toilet, calm hellos rather than jumping — because dogs settle far faster on predictability than on excitement.

The first night

Expect a rough night or two; that’s normal, not a sign anything’s wrong. Many people put the crate or bed in their own bedroom for the first nights — being able to hear and smell you reassures a nervous dog, and it means you can take a puppy out if they need to toilet. If they whine, a calm hand or your voice usually settles them; keep any night-time toilet trips boring and quick so 3 a.m. doesn’t turn into play-time. You can move their sleeping spot later, once they’ve found their feet.

The 3-3-3 timeline: what to expect

New dogs don’t settle in a day, and knowing the rough shape of it keeps you patient. The 3-3-3 timeline is the rule of thumb:

• First ~3 days — overwhelmed. Many dogs shut down: hiding, sleeping a lot, barely eating, or seeming strangely “perfect” because they’re too nervous to do anything. Don’t mistake this quiet for their real personality.
• First ~3 weeks — settling. A routine forms, they relax, and the real dog appears — which is often when normal testing behaviour (chewing, boundary-pushing, barking) shows up. This is progress, not regression.
• First ~3 months — at home. Most dogs feel genuinely secure and bonded by now.

It’s a guide, not a law — adult rescues and dogs from harder starts can take longer, and progress isn’t a straight line. Our full 3-3-3 decompression guide walks through each stage and what helps.

Introducing the home, kids, and other pets

Go slowly and let the more nervous animal set the pace. Introduce the home one room at a time. With children, teach them to let the dog approach rather than chase or hug, and never leave young kids and a new dog together unsupervised. With an existing dog, first meetings go best on a walk on neutral ground — not inside, where your resident dog may guard territory — parallel-walking with space before any nose-to-nose greeting, then short, supervised time at home with separate beds, bowls, and toys to prevent guarding. Cats need their own escape routes and a barrier at first. Rushed introductions cause most early conflict, so there’s no prize for hurrying.

Food, the vet, and safety in week one

Keep feeding the food they know, in a quiet spot, and work out the right amount for their weight with our free Dog Feeding Calculator once they’re eating normally. Book a vet check within the first week — it sorts vaccinations, parasite prevention, and microchipping, records a weight baseline, and starts the relationship before you need it urgently. Learn the foods that are never safe, too: our Dog Toxic-Foods Checker and dog food safety guide cover what to keep out of reach, which matters most in a new home where your dog is exploring.

What’s normal — and what needs a vet

In the first days, normal looks like: tiredness, hiding, a shaky appetite, broken sleep, house-training slip-ups, and general uncertainty. Give those time and routine. Call your vet, though, for persistent vomiting or diarrhoea, not eating for more than about a day, laboured breathing, lethargy or collapse, or anything that looks like pain — and if your dog ate something they shouldn’t have, don’t wait. Everything else is the ordinary, slow, rewarding work of a dog learning they’re finally home.

Once the dust settles, our new-dog hub maps out the rest of the first month — feeding, training, safety, and settling — and the New Dog Owner Starter Kit turns all of it into a plan you can fill in and follow.