It can take up to 3 months to fully resolve a flea infestation (or even longer in some cases) - see “What is the best way to resolve a home infestation?” for advice on eradicating a flea problem as quickly as possible. Q. Why am I still seeing flea droppings in my pet's coat after treatment?
Adult fleas will be killed within a few days but the floor should not be vacuumed, swept or washed for at least two weeks after treatment because there will still be eggs which will continue to hatch.
Often even after treating with a suitable flea treatment you will still see flea's on your animal. However, this does not mean that the treatment has not worked or that the fleas are immune – the reasons are fairly simple: Fleas are hatching in your home and re-infecting your pet.
When it has a host, an adult flea can live about 100 days. But how long can they live without a host? Those fleas typically live only one to two weeks. The entire lifespan of a flea, from egg to adulthood, can last a few weeks or even a few months.
Flea larvae can remain dormant in your home for months, so new fleas may continue to emerge — even after treatment. These fleas will quickly die after hatching if you've treated your home and kept up with regular flea preventive for your pet, but it can take a while for all the existing fleas to hatch and be killed.
The active ingredient in FRONTLINE (fipronil) kills fleas by affecting their nervous system, making them hyperactive before dying. These dying fleas often rise to the top of your pet's haircoat, so the presence of visible fleas after treating your pet, is a sign that the product is working.
If you do see fleas and they are moving slow enough to catch – success – they are busy dying!
Fleas Extra to penetrate deep into carpet fibres. Where possible, move large items of furniture and vacuum and spray underneath. You should also vacuum rapidly 24 hours after spraying and thereafter at least twice weekly for the next two weeks.
How long do fleas live in carpet? On average, a flea can live for two to three months in the carpet. But without intervention, they can stay in the carpet without end if they have a host. If a blood meal isn't consumed the flea may only survive for a few days.
Fleas have a complex life cycle. At some stages of their life cycle they are resistant to insecticides and other flea control products. In order to get rid of fleas in all stages of the life cycle, two or more follow-up treatments within 5-10 days after the first application are needed.
Advantage is a similar spot on application. It kills adult fleas on your pet and kills larvae in the pet's environment. It can also be used every 2-4 weeks as necessary and is safe for rabbits and ferrets as well.
The known safe answer is to wait the period of time the product is supposed to work, typically 30 days, before reapplying. An alternative is to bathe the pet in a detergent shampoo (meant to strip off skin oils) and reapply after 24 hours.
After your treatment
You must not: enter your home for at least two hours afterwards because the insecticide spray can be harmful to people and pets. clean or vacuum the treated areas for at least 14 days to allow the spray time to work.
Fleas in the house are typically found in sleeping areas such as bedding, carpet, and mattresses. Fleas on humans are often found in areas that are closer to the ground, as fleas tend to grab onto clothing while a person is outside.
5. Part your pet's fur. Spot-on flea treatments are only effective when applied directly to your pet's skin, not the surrounding fur. This can be a little tricky with longer-haired species, but it's important you make sure you can see your pet's skin before attempting to apply a spot-on.
Want to kill adult fleas fast? Lower the indoor temperature to freezing, and take all the humidity out of the room. Fleas don't like freezing temperatures or dry conditions. Newly emerged fleas can only survive 3 to 12 days without a blood meal before they starve.
Fleas in any life stage will either be killed in the course of the wash or will ultimately wind up in the sewer. Any insects that might happen to make it all the way to the dryer will be killed off by more heat and turbulence.
According to extensive studies conducted at Ohio State University, vacuuming is indeed an effective way of getting rid of fleas! Through these studies, scientists discovered that vacuuming killed 96% of adult fleas from carpets and 100% of the flea pupae and larvae.
Scientists have determined that vacuuming kills fleas in all stages of their lives, with an average of 96 percent success in adult fleas and 100 percent destruction of younger fleas.
One of the things that gets them to emerge from the cocoon is vibration, which to a flea means that there is an animal (= food) nearby. The vibration and pressure from vacuuming can trigger fleas to leave the cocoon where they are more vulnerable to pesticide application.
Inside, the home must be thoroughly vacuumed daily before and within 24 hours after treatment. Vacuuming should continue daily for up to two weeks. Vacuuming also stimulates pre-adult fleas to emerge sooner from their insecticide-resistant cocoons, thus hastening their contact with insecticide residues in the carpet.
If you see just a few fleas on your dog, you may be tempted to think it's not a big deal. Although the random flea might show up if you've just taken your pup for a walk, more than one or two could be a sign of a problem. As few as 20 fleas might mean your pet is infested, while the most could be between 200 to 300.
Not treating often enough
Fleas go through a life cycle of egg, larvae, pupae and adult. Most flea treatments just kill adult fleas, but fleas can continue to emerge for months after you think an infestation has ended. When a newly emerged female flea finds a host, she can lay eggs within one day.
95% are in the environment as flea eggs, larvae and pupae.
Seeing fleas after treatment isn't really about how long it takes for flea treatment to work or for fleas to die. It's about the number of life stages in the pet's environment that develop into new fleas and jump on a pet.