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Sergeant's Green Natural Flea Treatment Review

Sergeant’s Green Natural Flea Treatment Review


Are you looking for an effective, natural flea and tick treatment for your cat?

The more we learn about the long-term, and sometimes immediate, effects of chemical pesticides, the more we want a product that kills fleas and ticks naturally.

Sergeant’s claims to have just such a product and though they make a product for dogs as well, we’re going to focus on the one made for cats today.

Let’s take a look at Sergeant’s Green Natural Flea Treatment to see if it’s a safe and effective alternative to chemical pesticides for your cat.

Company Claims

Sergeant’s claims that their product kills and repels:

  • Fleas
  • Ticks
  • Mosquitoes

They also claim that the product works for up to 4 weeks and is safe for kids and animals even in multi-pet households.

The treatments comes in a 3-month supply packaged in individual doses.

Active Ingredients

  • Peppermint Oil 10%
  • Clove Oil 7%
  • Lemon Grass Oil 3%

It also has canola oil, vanillin and citric acid. It sounds like it would smell pretty good, but I see one huge issue already: essential oils are bad for cats.

How it Works

Essential oils such as clove and peppermint are toxic and repellant to fleas, ticks and mosquitoes.

In fact, they’ve been used for centuries to repel parasites; remember the citronella candles that you take camping? Yup, citronella is a natural bug repellant. Be careful though; just because a product is natural doesn’t mean that it’s safe (think arsenic!)

Cats, particularly, are extremely sensitive to essential oils and can suffer neurological damage, either temporary or permanent, and can even die from them.

What Are Users Saying?

It should be noted that peppermint oil is toxic to cats. So is clove oil, and possibly even clove oil. Use any of these products with care and it’s not a good idea to put liquid essential oils on their skins or anywhere where they can lick it.

The price, should you decide to check into this for your dog, is extremely competitive at $5 or less per dose.

Usage Information

Apply between the shoulder blades of your cat. Reapply every 4 weeks if you choose to use it.

Product Warnings and Side Effects

We’ve already discussed the user complaints but strangely enough, the box doesn’t say anything about any of those reactions and actually advertises the product as a safe, natural alternative.


We don’t recommend using this product on your cat. If you’re looking for a safe, natural product, this isn’t the one for your cat.

If you’ve used Sergeant’s Green on your cat for fleas, please let us know how it worked for you in the comments section below.

9 Responses to “Sergeant’s Green Natural Flea Treatment Review”
  1. Katie says:

    I’ve used it two months in a row last summer and all 8 of my cats did better than they did with any other treatment so far. I didn’t see any fleas either. I bought it a a grocery store, Kroger, that now only sells the spray. I am looking to see where it is sold as Walmart doesn’t carry it either. I now have 7 cats and Frontline isn’t an option with that many.

  2. Helen says:

    It’s terrible. My black long-haired cat’s hair fell out in clumps. He vomited repeatedly several days after application, producing huge hairballs mixed with undigested food. This stuff shouldn’t be allowed on the market.

  3. Helen says:

    I commented previously, saying my long-haired cat’s hair fell out in clumps after using the product and he vomited hairballs and undigested food. I washed him with Dawn dish detergent, but he’s vomited again – undigested food. I’m going to have to take him to the vet. This stuff is awful. It’s disgusting that they can sell this, and it’s even worse because they claim it’s “natural” and safe.

    • Theresa says:

      That’s horrible! I hope he feels better and thanks for sharing your experience. :(

  4. Ona says:

    My cat has been sick and lethargic all weekend after using this product. She shakes and growls when I touch her, and won’t hardly eat or drink a thing, and she cannot jump onto the bed any more, or onto anything else for that matter. She wants to be near me all the time but doesn’t want me to touch her anywhere except her head. I washed her in dish soap to get the oils off and will be taking her to the vet tomorrow if she’s not showing improvement. What an absolutely terrible product.

  5. M.K. says:

    We’ve used Sergeant’s Natural flea protection on our two cats for 3-4 years. No recognizable bad reactions.

  6. Dawn Wright says:

    I have used this for 5 months on my large fluffy boy. I have not noticed any thing unusual. I will monitor him very closely as I am about to do him again.

  7. Bekah says:

    This product had horrible side effects for my short haired tabby. He wouldn’t move, just laid around for 2 days, and did not want to eat or drink anything! He didn’t start to move around or look better until I washed it completely out with Dawn dish soap. Please do not put this on your cats :(

  8. Shasta says:

    Essential oils are TERRIBLE for cats. This flea collar just killed my dad’s cat in only SIXTEEN HOURS. The vet said he went into respiratory failure because cats cannot handle clove, cinnamon, or lemongrass oils.

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