Complete Dog Vaccination and Deworming Guide

Quick Care Checklist

• Have a new dog examined by a veterinarian before starting vaccines or parasite treatment.
• Start the DHPP series at 6-8 weeks and follow boosters until at least 16-20 weeks.
• Give rabies at 12-16 weeks according to state law.
• Deworm puppies on your veterinarian's schedule, often every 2 weeks at first, then monthly until 6 months.
• Test adult dogs for heartworm before starting prevention, then use monthly prevention year-round or as recommended in your area.
• Use products approved for dogs, dose by weight, and never use cat products on a dog.
• Monitor the dog for 48 hours after vaccination and call the vet for severe reactions.

Why Vaccines Matter

Core vaccines protect against diseases that are widespread and often deadly. In the US, the core vaccine for dogs is DHPP, which covers:

• Canine distemper, which attacks the respiratory, digestive, and nervous systems.
• Adenovirus and hepatitis, which damage the liver and other organs.
• Parvovirus, which is especially deadly in puppies.
• Parainfluenza, a common cause of respiratory infection.

Rabies is legally required in most states and is always considered a core vaccine. Non-core vaccines, including Bordetella, leptospirosis, Lyme, and canine influenza, depend on the dog's lifestyle and local risk.

Health Check First, Then Vaccines

• Let a new dog settle in for a few days, then have a veterinarian check it before starting the vaccine series.
• Treat parasites if present; a healthy dog responds better to vaccines.
• Start the series once the dog is healthy, usually at 6-8 weeks for puppies.

Puppy vaccine schedule

• 6-8 weeks: first DHPP dose.
• 10-12 weeks: second DHPP dose.
• 14-16 weeks: third DHPP dose.
• 16-20 weeks: final DHPP booster, because puppies finish losing maternal antibodies at different times.
• 12-16 weeks: first rabies vaccine, timed by state law.
• One year later: DHPP and rabies boosters, then every 1-3 years depending on state law and your veterinarian's advice.

Ask about Bordetella before boarding or group training, and leptospirosis or Lyme if the dog is outdoors in high-risk areas.

After vaccination care

• Wait 30 minutes at the clinic so staff can watch for an allergic reaction.
• Watch for 48 hours at home; mild tiredness or a smaller appetite for a day is normal.
• Call the vet for facial swelling, hives, repeated vomiting, or trouble breathing.

Parasite Prevention

• Puppies: deworm on the veterinarian's schedule, often every 2 weeks at first and then monthly, with monthly flea, tick, and heartworm prevention.
• Adult dogs: a fecal exam once or twice a year, with deworming only if parasites are found, and monthly heartworm prevention year-round or per local guidelines.
• Outdoor dogs: monthly flea and tick prevention year-round in most regions.
• Raw-fed dogs: ask your veterinarian; raw diets raise parasite risk and may need more frequent fecal testing.

How to give parasite treatments

• For topical spot-ons, part the fur between the shoulder blades and apply to the skin, then keep the dog from licking the area until dry.
• For oral preventives, hide the chew in food and watch to make sure it was swallowed.
• Avoid bathing a few days before or after applying a topical product, and follow the label.
• Never use cat products on a dog; some cat ingredients are not safe at dog doses. Check the label for the species and weight range.
• Use products approved for dogs and dose strictly by body weight.

Common Mistakes

• Skipping the final puppy booster because "two shots seemed enough."
• Starting heartworm prevention without a heartworm test in an adult dog.
• Guessing the dose instead of weighing the dog.
• Using a cat flea product on a dog.
• Bathing the dog right after a topical treatment.
• Deworming on a fixed schedule without a diagnosis for adult dogs.

FAQ

Does an indoor dog need vaccines?

Yes. Parvovirus and distemper can be carried indoors on shoes and clothing, and rabies is required by law in most states.

Can vaccines and deworming be done on the same day?

Many clinics do both at one visit. If you prefer to space them out, follow your veterinarian's advice.

What if an adult dog missed a vaccine?

Catch up as soon as possible. A dog with a complete puppy series usually needs one booster; if the history is unknown, your veterinarian may restart the series.

How often should dogs be dewormed?

Puppies follow a schedule set by the vet, often every 2 weeks at first and then monthly. Adult dogs usually need a fecal exam once or twice a year and treatment only if parasites are found.

Do all dogs need heartworm prevention?

Heartworm is found in all 50 states, and veterinarians generally recommend year-round prevention. A heartworm test is needed before starting, and then once a year.

Is it safe to use a cat dewormer on a dog?

No. Products are formulated for specific species and weights, so only use products labeled for dogs.