do cat flea collars kill fleas

Yes! All flea collars are designed to kill fleas. However, some flea collars may be more effective than others: Some collars target only adult fleas, while others may kill some of the younger stages of fleas, too.

Are Flea Collars Safe for Cats?

No, flea collars are generally not safe for cats. They function by either releasing chemicals into the pet’s skin or by releasing gas that is poisonous to fleas in the vicinity of the cat’s head.

Frequently, these substances are insecticides that pose a risk to cats, such as carbamates or organophosphates. When a person applies several flea products to a cat or when the cat gets some in his mouth and eats it, toxicity is more likely to occur. Poisoning can cause:

  • Vomiting
  • Drooling
  • Trouble breathing
  • Weakness
  • Muscle twitching
  • Paralysis
  • Death

Cats may swallow these substances when they groom the flea collar-touched area or when they are able to get their jaw under the collar and try to take it off.

This article is about flea collars that you can buy at pet stores, not collars that your veterinarian will prescribe.

Additionally, the skin in the vicinity of the flea collars can become irritated, leading the cat to scratch. Further skin damage and secondary infection are common.

Given their high sensitivity to chemicals, cats may be especially vulnerable to flea collars.

Using dog flea products on cats poses a particular risk.

How Do Flea Collars Work?

There are many different brands of flea collars. Generally speaking, flea collars function by either releasing a poisonous gas into the pet’s neck or head or by releasing chemicals that seep into the animal’s skin. An insect growth regulator (IGR) is a feature of some flea collars that stops the development of flea eggs and larvae.

One possible exception to this would be the Seresto flea collar made by Bayer. According to Bailey, after eight months, 20%E2%80%9C97% of veterinarians reported that their patients were either very satisfied or stateside with Seresto for dogs or cats. For this piece, I spoke with veterinarians, but none of them had firsthand knowledge of Seresto. Please talk to your veterinarian about this specific collar if you’re interested in purchasing one.

Do Flea Collars Work?

The short answer is no, as most flea collars work best in the head and neck region, which is not much use given that most fleas prefer the lower or rear parts of pets. Furthermore, the majority of flea collars are ineffective at killing adult fleas.


Do flea collars work if they already have fleas?

However, if your dog already has fleas or ticks, a flea and tick collar may not be effective in getting rid of them. In such cases, you may need to use other treatments such as flea and tick shampoos, sprays, powders, or topical treatments. Always read the label and follow the instructions carefully.

How long does it take a flea collar to kill fleas?

Seresto® kills existing fleas within 24 hours of applying the collar. New adult fleas are killed within 2 hours for the next 8 months. However, immature fleas can still develop in the environment for six weeks or more.

Why does my cat still have fleas with a flea collar?

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.

Do vets recommend cat flea collars?

Unlike other flea and tick protection, Seresto Cat flea and tick collars kill and repel fleas for eight continuous months. Seresto Cat flea and tick collars are recommended by veterinarians, stocked by 8,000 vet clinics* and trusted by pet owners for nearly a decade.