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Dog Deworming: Frequency, Importance and Obligations

Regular deworming is essential to keep your dog healthy and protect him against internal parasites, such as roundworms, tapeworms, and heartworms. This article explores the recommended frequency for deworming your dog, explains why quarterly treatment is often advised, describes how to detect the need for deworming in your pet, and discusses whether this practice is legally required.

How Often to Deworm a Dog?

The recommended deworming frequency for a dog may vary depending on its age, lifestyle, and general health. Generally :

  • Puppies: They should be dewormed every two weeks until they are three months old, then monthly until they are six months old.
  • Adult dogs: The standard frequency is to deworm your dog every 3 to 6 months. However, this recommendation may vary depending on your veterinarian's advice.

Why Deworm Every 3 Months?

Deworming your dog every three months is a common practice recommended for several reasons:

  • Parasite Life Cycle: This frequency coincides with the life cycle of many parasites, providing effective protection against infestations.
  • Disease Prevention: Some worms can cause serious illness in dogs and can even be transmissible to humans.
  • Public Health: By keeping your dog free of parasites, you are also helping to protect the health of your family and your community.

How Do I Know if My Dog Needs Dewormer?

Signs of a parasite infestation in your dog may include:

  • Unexplained weight loss
  • Variable appetite
  • Bloated stomach
  • Diarrhea, sometimes with blood
  • Presence of worms in the stool or around the anus
  • Lethargy

If you observe any of these symptoms, consult your veterinarian immediately for proper evaluation and treatment.

Is it obligatory to deworm your dog?

Although there is no specific law requiring the deworming of dogs in France, it is a practice strongly recommended by animal health professionals. For dogs that frequent public spaces, participate in exhibitions or travel internationally, some regulations or countries may require proof of regular deworming.


Regular deworming is crucial for your dog's health and for preventing health risks associated with internal parasites. By following the recommendations for deworming every three months and remaining alert for signs of infestation, you can help ensure a long, healthy and happy life for your four-legged friend. Remember, regular consultation with your veterinarian is essential to tailor the deworming program to your dog's specific needs.

FAQ about Dog Deworming

Q1: At what age should I start deworming my puppy?

Answer: Deworming a puppy should begin at two weeks of age. It then continues every two weeks until the age of three months, then monthly until six months. After this, it is recommended to move to an adult-friendly deworming program, usually every 3 to 6 months, depending on the dog's lifestyle and your veterinarian's advice.

Q2: How do I know if my dog ​​has worms?

Answer: Certain signs may indicate a worm infestation in your dog, such as weight loss, changing appetite, dull coat, diarrhea, vomiting, or the presence of worms in the stool or around the anus. of the dog. If you suspect an infestation, consult a veterinarian immediately for proper diagnosis and treatment.

Q3: Is deworming mandatory for all dogs?

Answer: Although there is no specific legal requirement for regular deworming in many countries, it is a highly recommended practice to maintain your dog's health and prevent the transmission of parasites to humans. For dogs frequenting public places or traveling internationally, some regulations may require proof of deworming.

Q4: Are dewormers safe for all dogs?

Answer: Dewormers prescribed by a veterinarian are generally safe for most dogs. However, it is important to choose the right product for your dog's age, weight and health. Some dogs may have allergic reactions or sensitivities to certain medications, making it important to consult a veterinarian before beginning any treatment.

Q5: Can I deworm my dog ​​without consulting a veterinarian?

Answer: It is possible to buy dewormers in pharmacies or online without a prescription. However, it is strongly recommended to consult a veterinarian before administering any new treatment to your dog. The veterinarian can recommend the most appropriate product and advise you on the frequency of treatment suitable for your specific situation.

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