Intestinal worms are one of the most common — and most preventable — health issues in dogs and cats. Puppies and kittens are often born with them, and adults pick them up from the environment, prey, or fleas. Regular deworming keeps them under control. Here's how often to deworm your pet and how to stay on schedule.
A quick note: This is general guidance. Your veterinarian sets the right deworming plan for your pet based on age, lifestyle, and local parasite risk. Always follow their advice.
Why deworming matters
Common intestinal worms — roundworms, hookworms, tapeworms, and whipworms — can cause weight loss, poor coat, diarrhea, vomiting, and, in young or small animals, serious illness. Some (like roundworms and hookworms) are zoonotic, meaning they can spread to people, which is why regular control matters for the whole household.
Deworming schedule by age
| Life stage | How often to deworm |
|------------|---------------------|
| Puppies | Every 2 weeks from 2 to 12 weeks of age, then monthly to 6 months |
| Kittens | Every 2 weeks from 3 to 9 weeks, then monthly to 6 months |
| Adult dogs & cats | Every 3 months (4x per year) as a general guideline |
| Higher-risk adults | More often — hunters, outdoor pets, and homes with children may need monthly |
Puppies and kittens are dewormed so frequently because many are born with worms or get them through their mother's milk.
Deworming and flea control go together
Tapeworms are usually caught when a pet swallows an infected flea while grooming. That means effective flea control is part of tapeworm prevention — treating one without the other leaves a gap. Many modern preventatives cover both parasites and worms in one product; ask your vet what fits your pet.
Signs your pet may have worms
Watch for:
- •Visible worms or rice-like segments in stool or around the rear
- •Scooting or excessive licking of the rear
- •A pot-bellied appearance (especially puppies/kittens)
- •Weight loss despite a normal appetite
- •Diarrhea or vomiting
- •Dull coat or low energy
Many pets with worms show no obvious signs, which is exactly why routine deworming and stool checks matter.
How to stay on schedule
A quarterly treatment is easy to forget — it's infrequent enough to slip your mind but important enough to matter. The fix is a reminder system:
- •Record each treatment and the product used.
- •Set the next due date so you're alerted before it's needed.
- •Keep it alongside flea/tick and heartworm so your whole parasite plan is in one view.
PetLover lets you set recurring reminders for deworming and every other preventative, and keeps a record of what was given and when — so your pet's parasite protection never quietly lapses.
Frequently asked questions
How often should I deworm my adult dog or cat?
As a general rule, every 3 months — but hunting, outdoor, or high-risk pets, and homes with young children, may need monthly. Your vet will tailor it.
Can I deworm my pet at home?
Over-the-counter dewormers exist, but the right product depends on which worms are involved. A vet-recommended dewormer (and an occasional stool test) is the most reliable approach.
Do indoor cats need deworming?
Yes, though often less frequently. Indoor cats can still get worms from fleas, insects, or contaminated soil on shoes. Ask your vet for an appropriate schedule.
The bottom line
Deworming is simple and cheap insurance: frequent for puppies and kittens, roughly quarterly for most adults, and paired with flea control to cover tapeworms. The only hard part is remembering the next date — so keep a record and let reminders handle it.
