What should I do if flea shampoo doesn't work? - briefly
If the shampoo does not eradicate the infestation, use a vet‑prescribed oral or topical flea product and ensure correct dosage and application; then treat the home by washing bedding, vacuuming thoroughly, and applying an environmental flea spray or fogger.
What should I do if flea shampoo doesn't work? - in detail
If a flea shampoo leaves the problem unresolved, first confirm that the product was applied correctly: follow the label’s timing, water temperature, and rinsing instructions precisely. Inadequate coverage or premature rinsing often reduces effectiveness.
Next, assess the possibility of flea resistance. Some strains have developed tolerance to common insecticides. In such cases, switch to a formula that contains a different active ingredient, such as a combination of pyriproxyfen and methoprene, or a product based on spinosad.
Environmental control is essential. Wash all bedding, blankets, and removable fabric at the hottest temperature the material can tolerate. Vacuum carpets, upholstery, and cracks in flooring, then discard the vacuum bag or empty the canister into a sealed bag. Apply a residual spray or fogger approved for indoor use, focusing on pet resting areas, under furniture, and pet carrier interiors. Repeat treatment after two weeks to target newly hatched larvae.
If the infestation persists despite these measures, obtain a veterinary evaluation. The veterinarian can prescribe prescription‑strength topical or oral flea medications, which often provide faster and more reliable eradication. Blood tests may be recommended to rule out secondary skin infections or allergic dermatitis that can mask the presence of fleas.
Consider integrated pest management: combine chemical treatments with mechanical removal (regular grooming with a fine‑toothed flea comb) and biological controls, such as introducing nematodes to outdoor yards if the pet spends time outside. Maintaining a consistent schedule—monthly preventive products and routine cleaning—prevents re‑infestation.
In summary, verify proper shampoo use, switch to an alternative active ingredient, treat the environment thoroughly, seek veterinary prescription if needed, and adopt a comprehensive prevention plan.