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    • Home  / Dr. Feargus’ New Zealand Pet Health Blog
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    Multi-Pet Homes in NZ: How to Stop Flea Bounce-Back

    August 14, 2025 2 min read

    Multi-Pet Homes in NZ: How to Stop Flea Bounce-Back

    Why bounce-back happens
    Fleas do not live only on one pet. Eggs fall into beds, rugs and car seats. If one pet is untreated or a dose is late, new adults keep hatching and the itch returns.

    Your 7-day quick plan

    • Day 1. Treat every dog and cat on the same day.

    • Day 1. Hot wash bedding and soft throws. Vacuum floors, skirting boards and car seats. Empty the vacuum outside.

    • Days 2 to 7. Vacuum daily. Wash bedding again mid week if the infestation was heavy.

    • Day 7. Check calendars and set phone reminders so the next doses are on time.

    Household timing checklist

    • Dose all pets on schedule.

    • Separate pets after spot-ons until the site is dry.

    • Treat new or visiting pets before they mix, if your vet agrees.

    • Keep the routine going for at least three months to clear home-hatched fleas.

    Pick a proven product for each pet
    Choose an application you can give on time. Match the correct weight band and read the label.

    Simple safety tips

    • Weigh each pet and choose the correct pack every time.

    • Use dog products on dogs only. Never use dog products on cats.

    • Do not split doses between pets.

    • Keep spot-ons away from children and other pets until dry.

    • Ask your vet first if a pet has a health condition, is pregnant, or takes other medication.

    When to see a vet
    Book a visit if there is broken skin, hotspots, hair loss or infection. If your pet seems unwell after a dose, call your vet for advice.

    FAQ

    Do indoor-only pets need treatment
    Often yes. Fleas thrive in warm homes. Treat every pet to stop the cycle.

    How long until fleas are gone
    You should see progress within one to two weeks. Eggs can keep hatching for several weeks, so stay consistent.

    Do I need house sprays
    Most homes turn the corner with on-time prevention for all pets plus hot washing and vacuuming. Ask your vet before using any sprays, especially around cats.

    Need help choosing
    Tell us your pets’ ages, weights and routine. We will suggest a simple plan for your home. Contact us.

    Feargus McConnell
    Feargus McConnell