Worming and Flea Treatment: How Often Do Pets Need It?

As a general rule, treat dogs and cats for worms roughly every three months and for fleas monthly — but always follow your vet's advice and the product instructions, as the right schedule depends on lifestyle and the product used.

Last updated: 9 June 2026 · PetsRus Team

Why routine prevention matters

• Fleas cause itching, allergies and can lead to tapeworm.
• Worms can affect your pet's health and, in some cases, human health too.
• Prevention is far easier than treating an infestation.

Getting it right

• Use vet-recommended products dosed for your pet's exact weight and species (never use a dog product on a cat).
• Treat all pets in the home together, and wash bedding regularly.
• Keep a simple reminder so you don't miss a dose.

Frequently asked questions

Do indoor cats need flea and worm treatment?

Usually yes — fleas and worms can still get indoors. Ask your vet what's right for your cat.

Are shop-bought treatments enough?

Some are; many vet products are more effective. If in doubt, ask your vet for a tailored plan.