As long as they don't interact with other unvaccinated dogs and are not put down on the ground/floor. It's absolutely fine for them to be out.
Avoid too much too soon
When introducing a new environment, it's important to take things slowly, as too much too soon can be overwhelming. Instead, start by going to a quiet pub, for a short period of time, before gradually building it up.
At 12 weeks it is unlikely you will be able to take your puppy out and about for a walk, however, they can be walked and played within the safe space of their own home. Taking your puppy for a walk before their final vaccinations runs the risk of them contracting illnesses or diseases which could be fatal.
The short answer is, after their final rounds of vaccines are completed, at about 16 weeks of age or whenever your pup's veterinarian suggests. Once the vaccine regimen is complete, your puppy should be ready for adventures in the great outdoors and ready to socialize with other dogs safely.
A mat or blanket to lay on the floor. This will give them some familiarity, but it also tells them it's 'their area' is to settle down. Bring treats and toys. Smaller treats can be used to reward your dog when they are displaying desirable behaviour.
It's absolutely fine for them to be out. If you don't take a puppy out until 12 weeks you're missing a vital part of the puppy's socialization period.
If you're wondering when can puppies go outside away from home, the American Veterinary Society of Animal Behavior (AVSAB) recommends that pet guardians begin taking puppies on walks and public outings as early as one week after their first round of vaccinations, at about seven weeks old.
Parvo can be found in almost any environment. It is transmitted when a susceptible dog comes in contact with the virus. This includes contact with the feces of an infected dog, or objects that contain the virus (shoes, clothes, bedding, bowls, grass, carpets, floors, etc).
Do not let your puppies walk outside as the risk of parvovirus and leptospirosis with unvaccinated puppies is high.
As long as your puppy is 10 weeks old or older at their second vaccination, they will be immune to distemper, hepatitis and parvovirus one week after this vaccination. So, one week after their second vaccination, your puppy can be walked in public areas, and usually attend puppy classes.
“Parvovirus is the world's most common canine infectious disease,” Hung explained. “This is a viral infection that is well-known for its contagiousness and severe damage to the intestines, particularly among puppies.
According to the American Kennel Club, puppies younger than 10 weeks cannot be left alone for more than an hour. From 3-6 months, they should not be left longer than their age in months (for example, 3-month-old puppies cannot be alone for longer than 3 hours).
The very best person to advise you on when your puppy can go outside is your vet, but generally they'll recommend not taking them into any public spaces until around 2 weeks after their second vaccination.
A safe confinement area, like an exercise pen or crate, is perfect for this purpose. If you use a crate or exercise pen appropriately, they will see their confinement area as a place to relax rather than as punishment. Alternatively, you can limit your puppy to a small and safe area with baby gates.
Time-outs should last for no more than 2 minutes maximum but always start with 30 seconds. If the dog is ignored for too lengthy a period of time, he will simply forget what behavior caused this consequence and you will have taught him nothing. Your timing is VERY important when doing a time-out.
Puppies are at the greatest risk for parvo between the ages of 6 weeks to 6 months. Puppies can receive their parvo vaccinations at 6, 8 and 12 weeks of age. They must receive a full series of vaccinations to ensure complete immunity. Puppies require a parvo booster vaccine between 14 and 16 weeks of age.
Some of the signs of parvovirus include lethargy; loss of appetite; abdominal pain and bloating; fever or low body temperature (hypothermia); vomiting; and severe, often bloody, diarrhea. Persistent vomiting and diarrhea can cause rapid dehydration, and damage to the intestines and immune system can cause septic shock.
Six to eight weeks against parvovirus and distemper diseases.
Until his vaccinations are complete, only take him to areas you can be certain are safe. Avoid places that are used by unknown dogs, and keep him away from stagnant puddles. Don't visit dog parks. If you have your own fenced yard, you're in luck.
Unvaccinated puppies can be safely socialized with fully-vaccinated adult dogs in safe environments like your home. Most puppy classes require proof of vaccination before you can enroll your puppy.
Although your pup can go outside in your safe space, how soon can you take your puppy for a walk? It's really important to wait until she is fully vaccinated before taking her out walking where other dogs have been. Fully vaccinated means a week to two weeks after the second jab in her primary vaccination course.