How to Prepare for Flea Treatment When You Have Pets

Published April 7, 2026 · Extermination DMP

Flea treatment is a two-front war. The exterminator handles your home. Your veterinarian handles your pets. If either front fails, the fleas win.

Here is how to coordinate both for a treatment that actually works.

The Two-Front Strategy

Front 1: Your Pets (Veterinarian)

Your vet will prescribe or apply:

• Topical treatment (like Advantage, Frontline) applied between the shoulder blades, OR
• Oral medication (like NexGard, Bravecto, Comfortis) — a chewable tablet that kills fleas for 30-90 days, OR
• Both for severe infestations

Front 2: Your Home (Exterminator)

• The insecticide kills adult fleas on contact
• The IGR prevents eggs and larvae from developing into adults — this breaks the reproductive cycle

Preparation Checklist — Before the Exterminator Arrives

Floors and Carpets

• [ ] Vacuum every carpeted surface thoroughly — this is critical
• [ ] Vacuum under all furniture, along all baseboards, between couch cushions
• [ ] Vacuum pet bedding areas intensively
• [ ] Dispose of the vacuum bag in a sealed bag outside, or empty and clean the canister
• [ ] Mop hard floors with soap and water

Pet Areas

• [ ] Wash all pet bedding in hot water (55°C minimum) and dry on high heat for 30 minutes
• [ ] Wash pet blankets, favorite cushions, and any fabric your pet sleeps on regularly
• [ ] Clean pet crates and carriers
• [ ] Remove food and water bowls

General

• [ ] Remove children's toys from the floor
• [ ] Cover fish tanks and turn off air pumps
• [ ] Remove birds from the home (birds are extremely sensitive to insecticides)
• [ ] Plan to keep all people and pets out of the home for 2-4 hours after treatment
• [ ] Clear floors along walls so baseboards are accessible

Do NOT Do

• Do not apply over-the-counter flea products to your carpets before the professional treatment — they can interfere with the professional product
• Do not flea-bomb (use foggers) — they are ineffective against fleas and can be dangerous
• Do not move to a different part of the house to sleep — fleas follow the host

After Treatment

Days 1-14: The Critical Period

Here is why: the treatment kills adult fleas and prevents new eggs from developing. But flea pupae (cocoons in the carpet) are virtually indestructible — no insecticide penetrates them. These pupae hatch over the next 1-2 weeks, and the newly emerged adults are killed by the residual product on your carpets.

During this period:

• Continue daily vacuuming — it triggers pupae to hatch faster, exposing them to the treatment product sooner
• Do NOT wash or steam clean carpets for at least 14 days — you will remove the residual product
• Keep your pets on their flea medication as prescribed
• Flea activity should decrease noticeably by day 7 and be minimal by day 14

Day 14: Assessment

If flea activity has NOT decreased, contact your exterminator for a follow-up treatment. Some severe infestations or cases with heavy pupal populations require a second application.

Ongoing Prevention

• Monthly flea prevention for ALL pets, year-round (fleas can survive indoors through Montreal winters in heated homes)
• Vacuum 2-3 times per week, especially pet resting areas
• Wash pet bedding weekly in hot water
• Check your pets for fleas regularly — part the fur and look for small dark insects or "flea dirt" (black specks that turn red when wet)

Frequently Asked Questions

How long does flea treatment take to work?

Can my cat get fleas in winter in Montreal?