Worms in Dogs: Types, Symptoms, and a Deworming Schedule
Roundworms, hookworms, whipworms, and tapeworms are the common intestinal worms in dogs. This guide explains how dogs catch them, the symptoms to watch for, a practical deworming schedule for puppies and adults, and simple hygiene steps that stop worms coming back.
Quick answer
Most dogs will pick up intestinal worms at some point, and many carry them with few visible signs. The practical answer is a routine deworming schedule set by your vet — frequent for puppies, then regular for adults based on lifestyle — plus prompt poo pick-up and good hygiene. If you see worms, or symptoms like a pot belly, weight loss, or diarrhoea, see your vet for the right treatment.
Roundworms, hookworms, whipworms, and tapeworms are the common intestinal worms in dogs.
The common types of worm
Four intestinal worms matter most. Roundworms are the most common, especially in puppies, and look like spaghetti. Hookworms attach to the gut wall and feed on blood, which can cause anaemia. Whipworms live in the large intestine and can cause chronic diarrhoea. Tapeworms are usually caught from swallowing an infected flea, and you may spot rice-like segments near the tail. Each is treated slightly differently, which is why identification matters.
How dogs catch worms
Dogs pick up worms in everyday ways: sniffing or eating infected soil or faeces, hunting and eating rodents, swallowing fleas during grooming, and — for puppies — from their mother before birth or through her milk. This is why puppies are so commonly affected and need early, repeated deworming. Warm, humid climates let worm eggs survive well in soil and parks, so exposure is common.
Tucking the tablet into a soft treat or pill pocket makes deworming stress-free for most dogs.
Symptoms to watch for
Many infected dogs look healthy, which is why routine deworming matters even without symptoms. When signs appear, look for a swollen pot belly (especially in puppies), a dull coat, weight loss despite a good appetite, diarrhoea that may contain blood or mucus, vomiting, or scooting the bottom on the floor. Visible worms in stool or vomit, or rice-like tapeworm segments around the tail, confirm the problem.
A practical deworming schedule
Follow your vet's plan, but a typical framework looks like this. Puppies: deworm roughly every two weeks from about two weeks of age until twelve weeks, then monthly until six months old. Adults: worm at least every three months, or more often for dogs that hunt, scavenge, or live with young children. Pregnant dogs are dewormed on a specific schedule advised by your vet. Always dose by current weight.
Prevention and hygiene
Breaking the life cycle is simple but consistent work. Pick up faeces promptly at home and in parks, control fleas year-round to prevent tapeworm, discourage hunting and scavenging, and wash hands after handling your dog or cleaning up. Keeping to the deworming schedule is the backbone; hygiene stops reinfection between doses.
Picking up waste promptly breaks the worm life cycle and protects other dogs and people.
Quick FAQs
How often should I deworm my adult dog? Most adult dogs need worming at least every three months, but hunters, scavengers, and homes with young children may need it monthly. Your vet can tailor the interval.
Can I catch worms from my dog? Some roundworms and hookworms can infect people, particularly children, so wash hands, pick up faeces promptly, and keep to a deworming routine.
Why does my dog still have worms after treatment? Common reasons are underdosing for current weight, reinfection from the environment or fleas, or using a product that doesn't cover that worm type. Check with your vet.
Do indoor dogs need deworming? Yes, though possibly less often. Even indoor dogs can get fleas (leading to tapeworm) or pick up eggs on walks, so don't skip it entirely.