Puppy Care Guide: The First 30 Days Week by Week

The first 30 days with a new puppy are the most intense — and the most important. What you do (and what you avoid doing) in these four weeks directly shapes the temperament, health, and emotional stability of the adult dog you'll have in twelve months. This complete puppy care guide walks you through the first 30 days week by week, with practical checklists and the most common mistakes to avoid.

Before the Puppy Arrives: Prepare the Space

Before your puppy walks through the door, their space needs to be ready. A well-prepared environment reduces the stress of the first days for both the puppy and you.

What to prepare:

• Safe resting zone: a crate or playpen with a soft blanket, fresh water, and 2–3 toys. A crate is not a punishment — it becomes their refuge.

• Feeding and water area: separate from the resting zone, stable and always accessible.

• Indoor toilet area: if the puppy isn't fully vaccinated yet, designate an indoor spot with puppy pads.

• Remove hazards: electrical cables within reach, toxic plants, cleaning products, small objects that could be swallowed.

You'll also want a name ready before day one — consistency from the first hour helps. Our list of the most popular dog names in Spain 2026 includes the science of what makes a name easy for a dog to learn.

Week 1 (Days 1–7): Arrival and Decompression

The First Day Should Be the Quietest

Resist the urge to introduce your puppy to everyone on day one. Arriving in a new home is, for a puppy, the most disruptive experience of their short life. They need time to process.

• Minimise visitors and stimulation: for the first 2–3 days, don't invite friends or children over. Let the puppy explore the house gradually, room by room.

• Establish from day one: the sleeping spot, the feeding schedule (3–4 times per day), and the toilet area.

• Don't give access to the whole house at once: too much space overwhelms a puppy. Start with one or two rooms.

First Vet Visit: Within 72 Hours

Don't wait. A general health check within the first 72 hours allows the vet to:

• Confirm the puppy's overall health

• Review whether the breeder has already started the deworming schedule

• Plan the vaccination schedule if the puppy hasn't received any yet

• Verify the microchip (required in Spain, normally done by the breeder at 7–8 weeks)

Bring any documentation the breeder gave you: health card, deworming certificate, registration papers.

Night Crying: What to Do and What Not to Do

Night crying is normal. Your puppy has just been separated from its mother and littermates — the only source of safety it has ever known. The crying doesn't mean you're doing anything wrong.

What NOT to do: go in every single time your puppy cries. If you do this consistently, you reinforce the behaviour and create an anxiety pattern.

What you can do: place a ticking clock wrapped in a blanket next to the crate (it mimics the heartbeat of a littermate) or a well-wrapped warm water bottle. Many puppies settle within 2–3 nights with these tactile and auditory cues.

Week 2 (Days 8–14): First Explorations

The Socialisation Window: Don't Waste It

A puppy's critical socialisation window lasts approximately until 12–14 weeks of age. During this period, the dog's brain is especially receptive to new stimuli — surfaces, sounds, people, objects. What the puppy doesn't experience now will be far harder to process as an adult.

Even if your puppy isn't fully vaccinated yet, you can — and should — expose them in a controlled way:

• Carry them outside so they can observe the environment without touching the ground

• Expose them to everyday sounds: traffic, music, rain, the vacuum cleaner

• Let trusted people hold them — always calmly and without overstimulation

This is the single highest-leverage thing you'll do this month. Our complete guide on how to socialize a puppy with other dogs and people covers the full checklist and the warning signs to watch for.

Introduce the Collar and Lead Indoors

Start with the collar: put it on for a few minutes each day and let the puppy wear it while playing or eating. Once they wear it without constantly scratching at it, attach the lead and let them drag it around the house under supervision.

First Commands: Short and Positive

Five minutes a day is enough. Start with just "sit": wait for the puppy to sit naturally, say "sit" the moment they do, and reward with a treat immediately. Don't repeat the command 20 times. No physical corrections. Our guide to training your dog at home has the full method for all five basic commands.

Vaccination Schedule

If the breeder hasn't started the vaccination schedule (first doses are typically given at 6–8 weeks), discuss this with your vet in week two to begin it. Delays in vaccinations are one of the most costly mistakes of the first months.

Week 3 (Days 15–21): Building Routine

Potty Training: Patience and Consistency

The principle is simple: the puppy always goes outside after eating, after sleeping, and after playing. That's potentially 10–15 trips outdoors per day in the first few weeks.

The fundamental rule: never scold or punish accidents indoors. The puppy cannot connect your anger to what happened 30 seconds ago — they only learn that toileting in your presence has negative consequences, which may lead them to hide and do it out of sight.

What works: when they go outside, praise enthusiastically and immediately give a treat. The reward must be immediate — literally while they're going, or the moment they finish.

Alone-Time Training: Start Now

Don't wait until the puppy is six months old to work on independence. Start in week three with very short sessions: five minutes alone in their safe zone, then ten, then twenty. Increase gradually over weeks — not days.

The goal isn't to leave them alone for hours — it's for them to learn that solitude is not a threat. This investment now prevents separation anxiety in the adult dog, one of the most difficult behavioural problems to treat.

Adjusting Meal Frequency

By week three, most medium-breed puppies can reduce from four to three meals per day. Small breeds (Chihuahua, Yorkshire Terrier) should stay on four meals until 4–6 months of age to avoid hypoglycaemia — a genuine medical risk for these breeds. Check with your vet if you're unsure about your specific breed.

Week 4 (Days 22–30): Growing Confidence

First Proper Outdoor Walks

If your vet confirms that the vaccination schedule allows it, week four is the time for first proper walks with all four paws on the ground. Start short (10–15 minutes) on quiet surfaces. The goal isn't exercise — it's calm exploration.

Expect: the puppy stopping to sniff for five minutes at a time, refusing to walk on a certain surface, startling at a sound. All of this is normal. Don't force them — let them go at their own pace.

Remember the 5-minute rule: 5 minutes of formal walking per month of age, twice a day. More detail in our guide to how much exercise a dog needs by breed.

Social Play With Vaccinated Adult Dogs

If you have access to trusted, vaccinated adult dogs — from family or friends — week four is a good time for a first supervised interaction. Play with a balanced adult dog teaches the puppy canine communication rules that you simply cannot teach them yourself.

Signs of healthy play: both dogs alternate roles (chaser/chased), take natural breaks, and neither shows body stiffness or real alert sounds. Step in if either dog is clearly overwhelmed.

Introduce the Grooming Routine Now

One of the most common mistakes: waiting until the dog is an adult to start with brushing, handling paws, and touching ears. By two years old, many dogs have developed active resistance to these forms of handling — making vet visits and grooming appointments genuinely difficult.

Start now, even if it's not necessary: touch the puppy's paws, ears, mouth, and tail daily, always positively. Give them a brief brush even if they don't need it. The adult dog who tolerates these routines calmly is the direct result of normalising them as a puppy.

Sleep Should Be Improving

By the end of week four, most puppies are sleeping several hours consecutively through the night. If frequent night crying continues into week four, it's worth discussing with your vet or a behaviourist — there may be an underlying health reason or a behavioural pattern that's worth addressing early.

Health Checklist: First 30 Days

• ✅ Vet visit within the first 72 hours

• ✅ Deworming (typically at 2, 4, 6, and 8 weeks)

• ✅ Vaccination schedule confirmed with the vet

• ✅ Microchip verified (required in Spain)

• ✅ No contact with unknown dogs until 2 weeks after full vaccination

• ✅ External parasite treatment (flea and tick prevention) as directed by the vet

Breed-Specific Notes

Large breeds (Labrador, Golden Retriever, German Shepherd): they grow fast and their joints are vulnerable during the first year. Avoid repeated stair climbing, jumping, and excessive exercise. Joint damage at this stage can be permanent.

Small breeds (Chihuahua, Yorkshire Terrier, Maltese): they are prone to hypoglycaemia — low blood sugar. Feed four times a day until 4–6 months. If you notice lethargy, trembling, or disorientation, go to the emergency vet immediately.

FAQ — Frequently Asked Questions

When can a puppy go on proper outdoor walks? The current veterinary consensus is that a puppy can walk outdoors on the ground 2 weeks after completing the primary vaccination course. Before that, they can go outside in your arms for controlled socialisation.

When should formal training start? You can — and should — start with basic commands as soon as the puppy arrives home (7–8 weeks). Puppy classes with a certified instructor are ideal between 8 and 14 weeks.

How long can a puppy be left alone? A practical rule: one month of age equals one hour alone. An 8-week-old puppy shouldn't be alone for more than two hours. Beyond time, they also have a physical need to toilet far more frequently than an adult dog.

Is crating cruel? No — used correctly, it's the opposite. Dogs are den animals and naturally seek small, enclosed, safe spaces. A properly introduced crate becomes your puppy's favourite resting spot.

My puppy bites everything — is that normal? Exploratory mouthing is completely normal in puppies — it's how they discover the world. What isn't normal is biting hard enough to hurt, or biting that increases in intensity. When your puppy bites too hard, make a sharp "ouch" sound, withdraw your hand, and stop play for 20–30 seconds. Repeat consistently.

My puppy won't eat. Should I worry? Puppies cannot safely skip more than 12 hours without eating — small breeds especially. If your puppy refuses two consecutive meals, call your vet the same day. See our full guide on what to do if your dog won't eat.

When Your Puppy Is Ready for a Sitter

The first month at home is yours. But the time will come when you need to travel, work long hours, or simply take a break. When that moment arrives, My Tails has verified sitters who are experienced with puppies — patient with toilet training routines, attentive to the needs of a developing dog, and available in Madrid, Barcelona, and Valencia.

Find the right sitter for your puppy when they're ready — on My Tails.

Browse verified sitters at mytails.eu →