It's recommended to treat for worms at least every 3 months. The ITCH Wormer for Cats letterbox subscription service makes it easy for pet owners to stay on top of treatments. There may be situations when more frequent treatment is necessary, especially in roundworm infestations. If you have a persistent roundworm infestation, please chat to your vet.
Also, if your cat lives with small children or those with auto-immune deficiencies, eats a raw diet or likes to hunt, vets recommend a monthly worming programme. We'll tailor your pet's plan accordingly depending on the details you share with us.