"My dog barely goes outside, so once a year should be enough." We hear this often, and it's one of the most common misunderstandings pet parents have. Here's what the actual deworming schedule should look like, and why.

Deworming Myths: Why "Once a Year" Isn't Enough, Even for Indoor Pets

By Dr. Brajmadhuri, TruVet Pet Care Clinic, Sector 79, Gurgaon

A fair number of the pet parents we see genuinely believe deworming is something you do once a year, almost like a formality alongside vaccination, something to check off a list and forget about for the next twelve months. It is an understandable assumption, but it does not match how worms actually behave, especially in a climate like Gurugram's.

Why once a year falls short

India's warm, humid climate supports worms all year round, unlike colder countries where cold winters naturally cut down their numbers for part of the year and give pets a kind of seasonal break. That single fact changes the entire calculation. A schedule built around once yearly treatment leaves long windows where reinfection can quietly take hold, completely undetected, for months at a stretch.

Puppies and kittens need a much more frequent schedule than adults, since their immune systems are still developing and they are especially vulnerable to a heavy worm load early in life. And even for a fully grown, healthy adult dog or cat, most veterinary guidance in India recommends deworming every three months, not once a year as many people assume.

The typical schedule looks like this. Puppies and kittens need deworming every two weeks from two weeks of age until they are twelve weeks old, then monthly until six months of age, since this is the period when they are most vulnerable. Adult dogs and cats should be dewormed every three months for life, regardless of whether they are considered low risk or high risk overall. Higher risk pets, including those that scavenge, spend significant time outdoors, or live in multi pet households, may need even more frequent deworming based on individual assessment by your vet. Pregnant or nursing pets require a modified schedule under direct veterinary supervision, since some dewormers are not safe during pregnancy while certain worms can pass to puppies or kittens through the mother if left untreated.

"But my dog barely goes outside"

This is the myth we hear most often, and it simply does not hold up under any real scrutiny. Indoor pets can still pick up worms through several routes that have nothing at all to do with long walks or dog parks. Worm eggs get tracked indoors on shoes and clothing without anyone noticing. Contact with another pet in the household who does go outside is enough to pass worms along. Fleas can carry worms too, and a single flea bite is all it takes. Contaminated soil in a balcony planter or a building's common area is another surprisingly common source. And insects that curious cats in particular love to catch and eat can carry worms as well.

None of these routes require a dog or cat to spend any meaningful time outdoors, which is exactly why indoor only pets in India still need routine deworming every three to six months at an absolute minimum, and every three months is really the safer default in a climate like ours where the risk never fully goes away.

Signs of a worm infestation

Many infestations show no obvious symptoms at all, which is part of why relying on visible signs alone is not a reliable strategy, even for an attentive owner. When symptoms do appear, they can include visible worms in the stool or around the anus, sometimes resembling small grains of rice, a pot bellied appearance particularly noticeable in puppies, unexplained weight loss despite a normal or even increased appetite, vomiting or diarrhoea, a dull and poor quality coat, and general tiredness or weakness that seems to come from nowhere. If you notice blood in the stool, a visibly swollen belly in a puppy, or a pet that seems weak and is refusing food, that calls for a same day vet visit rather than reaching for an at home dewormer and hoping for the best.

Why it matters beyond your own pet

Some worms, including roundworms and hookworms, can infect people too, and children playing in contaminated soil are at particular risk given how much time young kids spend close to the ground outdoors or in gardens. Routine deworming is not just about your pet's comfort, then. It also reduces the chance of worms spreading to people in the household and to other animals your pet comes into contact with regularly, which makes it as much a household health measure as an individual pet care one.

What we do not recommend

Please do not use human dewormers on a pet under any circumstances, and please do not guess at dosing based on a product's packaging alone. Dewormers are dosed by weight, and using the wrong product or an inaccurate dose can be ineffective at best and genuinely unsafe at worst, particularly for puppies, pregnant animals, and very small breeds where the margin for error is smaller. A stool test at your vet visit helps confirm which worms, if any, are actually present, so treatment ends up targeted rather than a shot in the dark.

The TruVet takeaway

"Once a year" is one of the most common and most understandable misconceptions in pet care, but India's climate simply does not support a once yearly schedule, however reasonable it might sound on paper. Every three months for adult pets, and a more frequent schedule for puppies and kittens, is the standard we recommend, indoor lifestyle or not. If you are not sure when your pet was last dewormed, bring it up at your next visit and we will get you back on track without any judgment.

Find us at TruVet Pet Care Clinic, Shop No 4-6, opposite Bestech Park View Altura, Sector 79, Naurangpur, Gurugram, Haryana 122051. Dr. Brajmadhuri personally conducts every consultation, and the clinic is open all seven days, 10am to 8pm, for OPD consultation, vaccination, deworming, surgery, and health checkups for dogs and cats. Reach us on WhatsApp at +91 98710 10355.