Puppy vaccinations: a timeline for new owners

This guide is general information, not veterinary advice. If you're worried about your dog, speak to your vet.

Your puppy's first jabs shape their first few months: when they can walk outside, meet other dogs and start classes. UK charities broadly agree on the plan, but the exact ages vary, so here's each view side by side.

Puppies get some early protection from antibodies in their mother's milk. These fade, so puppies need vaccines to build their own immunity (Dogs Trust). The core puppy vaccines protect against parvovirus, distemper, hepatitis and leptospirosis (PDSA). Our vaccinations guide explains each one.

Typical UK puppy vaccination ages

Most puppies have two injections, and some need a third (PDSA). Here's what each source says about timing:

PDSA: start at around 6 to 8 weeks old, with 2 injections 2 to 4 weeks apart. Some puppies need a third (PDSA). Another PDSA page says vaccination programmes for puppies start from around eight weeks (PDSA).
Dogs Trust: the first core vaccinations from six weeks of age, and a second two to four weeks later, depending on the puppy's age and the vaccine brand (Dogs Trust).
Blue Cross: the first vaccination at between six and nine weeks old, and the second around four weeks later (Blue Cross). Its parvovirus page gives a first vaccine at between six and 10 weeks, with the second two to four weeks later depending on the brand. It adds that for some breeds, such as Rottweilers and Dobermans, a third vaccine after 16 weeks old is also advised (Blue Cross).
RSPCA: typically vaccinated at eight and ten weeks, although puppies can be vaccinated as early as four to six weeks, with the second dose usually two to four weeks later (RSPCA). The RSPCA's puppy care timeline says your puppy can have their second vaccinations at around 12 weeks (RSPCA).
BSAVA (for vets): most primary courses are at least 2 doses given 2 to 5 weeks apart, then a booster a year later. It generally advises following each vaccine's data sheet (BSAVA).

The differences mostly come down to the vaccine brand your vet uses and your puppy's age when they come home (Dogs Trust; Blue Cross). Your vet will give you the exact schedule.

The first booster

PDSA says protection from the puppy course lasts a year, and then your dog needs a booster (PDSA). Blue Cross also says a further booster must be given a year later (Blue Cross). The RSPCA says your puppy will need a booster at 6 or 12 months (RSPCA). The BSAVA notes that international (WSAVA) guidance discusses an extra dose at around 6 months of age for some puppies, and supports vets weighing that up alongside the vaccine data sheet (BSAVA).

Paperwork from your breeder or rescue

The RSPCA says whoever cared for your puppy before you should have organised their first vaccination (RSPCA). Your vet will need to see your puppy's vaccination paperwork, and a responsible breeder should give you this (Dogs Trust). If you adopt a puppy from Dogs Trust, they'll already have had their first set of vaccinations (Dogs Trust).

When can my puppy go out and meet other dogs?

Every source says to check with your vet, because it depends on the vaccine. Here's how the guidance compares:

PDSA: puppies are fully protected 2 to 4 weeks after their final injection (PDSA). PDSA's parvovirus page says your puppy will be safe to go out for a walk and meet other dogs one to two weeks after they complete their first course (PDSA). For leptospirosis, it says unvaccinated puppies have no protection until one to three weeks after completing the course (PDSA).
Dogs Trust: your puppy can typically go on their first walk one to two weeks after completing their primary course. A puppy who has only had one vaccination shouldn't be walked outside (Dogs Trust).
Battersea: puppies shouldn't be out on the ground until they're fully vaccinated, typically around two weeks after their second set of vaccinations (Battersea; Battersea).

Socialising before vaccinations are complete

You don't need to wait to start socialising. Your puppy can safely experience the world from your arms, a carrier or a blanket on the ground from the day they come home (Battersea). Socialisation matters a lot, so here's what the charities suggest while you wait.

Carrying your puppy out

Carry your puppy in public places and don't put them on the ground (PDSA; PDSA).
Dogs Trust suggests a carrier or a secure pram (Dogs Trust), and Battersea a sling or secure pram (Battersea).
The RSPCA suggests carrying your puppy around outside to meet new people, sights and sounds at 8 to 12 weeks (RSPCA).

Gardens

PDSA says your garden is safe as long as no unvaccinated dogs have visited recently and it's secure from foxes (PDSA).
Dogs Trust says your puppy can go in the garden after their first vaccination if it's enclosed and not used by dogs of unknown vaccination status. Be careful in gardens that foxes visit often, because leptospirosis can spread in their urine (Dogs Trust).
Keep your puppy away from ponds, lakes, rivers and stagnant water until they're protected, because of the leptospirosis risk (Dogs Trust; Dogs Trust; Battersea).

Meeting other dogs and people

Your puppy can meet healthy, fully vaccinated dogs, at home or a friend's dogs visiting you (Dogs Trust; PDSA; Battersea). Don't let them mix with unvaccinated dogs from outside your household (PDSA).
PDSA suggests washing paws (and feet) during this time, because people and other pets can bring germs in from walks (PDSA).
Advice on visiting other homes differs, even between PDSA pages. One says it's best not to take your puppy to anyone else's house until they're fully vaccinated (PDSA). Another says your puppy is safe in friends' or family's homes as long as no unvaccinated dogs have visited recently (PDSA). If in doubt, ask your vet.
If your puppy isn't fully vaccinated, Battersea suggests letting them watch other dogs from a safe distance (Battersea).

Our puppy training basics guide has much more on socialisation, and our new puppy checklist covers what to sort out first.

When can puppies start classes?

Views differ on whether your puppy needs to have finished their course before a class:

PDSA says socialising is extremely important and the risk of catching parvovirus from another healthy puppy is very low, so as long as your puppy is fit and healthy, it advises enrolling them in a puppy class (PDSA). It adds that some trainers may ask that your puppy has had their first vaccination before starting (PDSA).
PDSA's socialisation advice says to check which vaccines your puppy needs before their first class, and to ask whether your vet practice runs puppy socialisation groups (PDSA).
The RSPCA places puppy classes in the "12 weeks onwards" stage, alongside socialising outside once your puppy is fully vaccinated. It suggests booking early, because classes can fill up (RSPCA).

Ask the class what they need to see before your first session. Find classes on our Liverpool dog trainers page, and see our puppy training basics guide for what to expect.

Worming, fleas and ticks

Dogs Trust says the vaccination period is a good time to start a flea, tick and worming routine for your puppy (Dogs Trust). The RSPCA suggests asking about worming, flea treatment and neutering at the second vaccination (RSPCA). Blue Cross says puppies need worming regularly, often until they're six months old, and to ask your vet how best to use their products (Blue Cross).

After the jabs: what's normal?

Most puppies have no side effects. Some have a mild temperature, low energy or a reduced appetite, which usually pass within 24 to 48 hours (PDSA). Blue Cross says some dogs develop a swelling where the vaccine went in, which should go down within three to four weeks (Blue Cross). Serious reactions are very rare, but speak to your vet if you're worried (PDSA; Blue Cross).

Registering with a Liverpool vet

The RSPCA suggests finding a vet before your puppy comes home (RSPCA). Browse our Liverpool vets directory to find a practice near you.

Out-of-hours emergencies in Liverpool: Medivet 24 Hour Alder, 410 Eaton Road, West Derby, L12 3HG, says it is open 24 hours a day, 365 days a year. Call 0151 220 4668 (Medivet, checked 18 Oct 2026). Vets Now Liverpool, based in the PDSA Pet Hospital on Woolfall Heath Avenue, Huyton, L36 3YD, opens from 6pm on weeknights, from noon on Saturdays, and all day on Sundays and bank holidays. Call 0151 271 5727 (Vets Now, checked 18 Oct 2026). Always ring before you set off, and ask your own vet which service covers their out-of-hours calls.

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