Why Flea and Tick Prevention Matters

Fleas and ticks are more than just a nuisance — they are vectors for serious diseases and can cause significant health problems in pets and their owners. A single flea can bite your pet up to 400 times per day, and a female flea can lay up to 50 eggs daily. Ticks transmit dangerous diseases including Lyme disease, Ehrlichiosis, and Anaplasmosis. Regular prevention is far easier, cheaper, and more effective than treating an established infestation.

Understanding Fleas

Lifecycle

Understanding the flea lifecycle is key to effective control:

  1. Eggs (50% of the infestation): Laid on the pet, fall off into the environment
  2. Larvae (35%): Develop in carpets, bedding, cracks, and outdoor soil
  3. Pupae (10%): Cocoons can lie dormant for months, resistant to insecticides
  4. Adults (5%): Live on the pet, feeding and reproducing

Only 5% of a flea infestation is on the pet — the other 95% is in the environment. This is why treating only the pet is often insufficient.

Health Risks from Fleas

  • Flea Allergy Dermatitis (FAD): The most common skin disease in pets; severe itching from an allergic reaction to flea saliva
  • Anemia: Heavy infestations can cause life-threatening blood loss, especially in kittens and puppies
  • Tapeworms: Fleas carry Dipylidium caninum tapeworm larvae
  • Bartonella (Cat Scratch Fever): Transmitted between cats via fleas, can infect humans
  • Myxomatosis and other diseases

Understanding Ticks

Common Ticks in Canada

  • Black-legged tick (deer tick): Transmits Lyme disease and Anaplasmosis
  • American dog tick: Transmits Rocky Mountain spotted fever and tularemia
  • Brown dog tick: Transmits Ehrlichiosis; can infest homes
  • Lone star tick: Expanding range into southern Canada

Health Risks from Ticks

  • Lyme disease: Joint pain, fever, kidney disease
  • Ehrlichiosis: Fever, bleeding disorders, organ damage
  • Anaplasmosis: Fever, joint pain, lethargy
  • Rocky Mountain Spotted Fever: Fever, joint pain, neurological signs
  • Tick paralysis: Toxin in tick saliva can cause ascending paralysis

Prevention Options

Oral Preventatives

  • Advantages: Easy to administer, not affected by bathing or swimming, some provide rapid kill
  • Common products: NexGard (afoxolaner), Simparica (sarolaner), Bravecto (fluralaner), Credelio (lotilaner)
  • Duration: Monthly or every 3 months depending on product
  • Note: Available for dogs; cat-specific products are more limited

Topical (Spot-On) Preventatives

  • Advantages: Applied to the skin between shoulder blades, no pill needed
  • Common products: Revolution (selamectin), Advantage (imidacloprid), Frontline (fipronil), Bravecto Topical
  • Duration: Monthly
  • Considerations: May be affected by bathing; some can be washed off

Collars

  • Advantages: Long-lasting (up to 8 months), easy application
  • Common products: Seresto (imidacloprid + flumethrin)
  • Considerations: Must fit properly; some pets may be sensitive to the collar material

Environmental Treatment

For existing infestations:

  • Vacuum thoroughly and frequently (dispose of bags immediately)
  • Wash all pet bedding in hot water
  • Environmental sprays or foggers containing insect growth regulators (IGR)
  • Professional pest control for severe infestations
  • Treat all pets in the household simultaneously

Important Safety Notes

  • Never use dog flea products on cats — many dog products contain permethrin, which is toxic and potentially fatal to cats
  • Always use products appropriate for your pet's species, weight, and age
  • Consult your veterinarian before combining multiple parasite preventatives
  • Some natural or "homeopathic" flea remedies are ineffective and may be toxic
  • Essential oils (tea tree, pennyroyal, citrus) can be dangerous for pets

Year-Round Prevention

In Canada, many pet owners only use flea and tick prevention during warm months. However, year-round prevention is increasingly recommended because:

  • Fleas can survive indoors year-round
  • Ticks are active whenever temperatures are above 4°C
  • Climate change is extending the parasite season
  • Preventing an infestation is far easier than eliminating one
  • Many products also protect against other parasites (heartworm, intestinal worms)

When to Start

  • Puppies and kittens can typically start flea prevention at 8 weeks of age (check product labels)
  • Start before flea/tick season begins
  • Continue throughout the season or year-round for maximum protection
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