How Often Should I Deworm My Dog?

Deworming is an important part of caring for your dog. Not only does deworming help prevent your dog from getting a parasite, but it also prevents them from passing it on to you and your family. Making sure that you know how often to deworm and what the signs of needing deworming are will help keep both you and your canine companion happy and healthy.

How Often Should I Deworm My Dog?

The frequency of deworming depends on the type of parasiticide used, your dog’s age, health and environment. In general, puppies should be dewormed every 3-4 weeks until they are 6 months old. After that age a puppy dose can usually be given every 6 months. The number of treatments required varies greatly depending on the type of worm being treated as well as other factors such as your dog’s weight and lifestyle.

When to Deworm Puppies

When it comes to deworming puppies, the answer is simple: as often as you can. Puppies should be dewormed at least once a month, but they are usually dewormed at least twice a month. If you want to spoil your puppy and make sure they’re always healthy and fit, then deworm them once a week or twice a week!

When to Deworm Adult Dogs

In general, you’ll want to deworm your dog every six months. The following are recommended timelines for deworming adult dogs:

  • 6 months old
  • 12 months old
  • 18 months old
  • 24 months old
  • 30 months old
  • 36 months old

For some owners, it’s important that their dog has been dewormed by the time they’re six months old. This is because most puppies will have all of their vaccines at this point and therefore be protected against diseases such as heartworms—which can live in a dog’s heart and lungs for years before causing symptoms or death. If you’ve followed our advice on how often to deworm puppies, then by the time your puppy turns around two years of age (and has received all his shots), he’ll be ready for his first round of adult deworming medication!

Signs that Your Dog Needs to be Dewormed

A good rule of thumb is to deworm your dog every three months. Many veterinarians recommend doing this at the same time as vaccinations, but others advise that it’s better to do it in between vaccinations.

If you notice any of the following symptoms in your dog, they may be infected with worms:

  • Coughing or vomiting
  • Diarrhea or constipation
  • Weight loss (especially if your dog suddenly loses weight without any change in diet or exercise)
  • Poor coat quality (their fur looks dull and thin)


With all that said, it can be really confusing to know how often you should deworm your dog. Dogs don’t always show signs of having worms or parasites and there is no way to tell just by looking at them if they have worms in their gut. If you think your dog may have worms, then the best thing for you to do is schedule an appointment with a veterinarian right away so they can assess your pup’s health and make recommendations on treatment options as necessary.