Deworming a dog: how often, and how to do it stress-free
Intestinal worms are not limited to shelter puppies: several prevalence studies on well-monitored pet dogs have found roundworm or tapeworm eggs in a significant share of animals tested, even with no visible symptoms (research on Google Scholar). Find our other health pointers in the dog care and grooming section.
How often should you deworm?
Standard veterinary guidance recommends deworming every three months for a healthy adult, and more often for puppies whose immune systems are still immature — starting at two weeks old, then every two to three weeks until weaning. A dog that mixes with many other animals, eats prey, or lives in the countryside may need a tighter schedule; ask your vet rather than relying on a single blanket rule.
Tablet, spot-on or paste: which format?
The tablet remains the most common format, but a suspicious dog can discreetly spit it out. Meat-flavoured tablets make administration much easier, as do pastes mixed into food. Combined spot-on treatments (external and internal parasite control) avoid oral dosing altogether but do not always cover the same range of worms: check the label before swapping one for the other.
Getting the tablet down without a struggle
Hiding the dewormer in a small ball of wet food or soft cheese works for most dogs; give an identical plain bite first so it does not raise suspicion, then the ball containing the tablet, followed by a third plain bite. For a dog that inspects everything, direct manual administration at the back of the throat remains an option, done calmly and without forcing — the technique is trained like any other handling, as we detail in our guide on removing a tick.
Frequently asked questions
Does an indoor-only dog still need deworming?
Yes: some parasite eggs survive for a long time in the home environment, and worms can also be transmitted via fleas or contact with other animals.
Does a natural dewormer replace a chemical one?
No, no plant-based product has shown comparable efficacy in routine use; vet-approved products remain the reference for reliable protection.
Should you deworm before a vaccine?
It is good practice in puppies, since an immune system burdened by parasites responds less well to vaccination.
This guide is part of Planète Pets’s Dogs universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.