Deworming a dog: how often, and how to do it stress-free
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
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. Find our other health pointers in the dog care and grooming section.
Contents · 4 sections
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.
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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.