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How Effective is Brewer's Yeast for Fleas?

Giving a dog the tablet form of brewer's yeast may be ineffective.
Considered a major pest to pets such as dogs, fleas bite and suck the blood of humans and animals.
Brewer's yeast for fleas should be dosed at 1 teaspoon for small dogs or for cats.
A solution of .25 cups of yeast in 1 quart of water can be put into a spray bottle and sprayed onto a pet's coat.
Brewer's yeast.
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  • Written By: Thomma Grindstaff
  • Edited By: Nancy Fann-Im
  • Last Modified Date: 26 November 2014
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Brewer's yeast for fleas is thought to be effective, because the yeast contains thiamine. The smell and taste of thiamine is believed to be repulsive to fleas, so when dogs and cats eat brewer's yeast, the fleas are repelled by the presence of thiamine on the skin or in the blood of dogs and cats. Thiamine is a part of the B vitamin group.

Getting rid of fleas with brewer's yeast is easy to do, since the yeast is readily available from grocery stores, health food stores and online sources. It can be bought as a powder, a liquid or flakes. The most practical choice when it comes to using brewer's yeast is its powder form. For natural flea control, the powder can be mixed with pet food, dusted onto a pet's coat or dissolved in water.

Brewer's yeast for fleas should be dosed at 1 teaspoon (4.9 ml) for small dogs or for cats. Medium-sized dogs should be given 2 teaspoons (10 ml), and larger dogs should be given 1 tablespoon (14.8 ml). The yeast can be sprinkled on dog or cat food, or it can be used directly on pets' coats as flea-control powder. If Brewer's yeast is utilized as a dietary supplement, it can take up to a month before it reaches maximum flea control power. Pet owners might want to start dusting their pet's coat or supplementing their pet's diet with brewer's yeast early in the spring, before a major flea problem occurs.

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A mix of brewer's yeast with garlic should be avoided. Garlic is toxic to both dogs and cats, with cats being more sensitive to garlic than dogs are. It is possible for either cats or dogs to be allergic to brewer's yeast. If a dog or cat shows signs of an allergic reaction on its skin after it eats brewer's yeast for fleas, then use of the yeast should be stopped. Dog and cat owners need to be careful about how much yeast they give their pets, since overdosing with Brewer's yeast can cause skin allergy.

Another way to use brewer's yeast for fleas is to allow 0.25 cup (59 ml) of the yeast to dissolve in 1 quart (946 ml) water. This solution can be put into a spray bottle and sprayed onto a pet's coat. For maximum effectiveness, the mixture should be combed or rubbed into the fur.

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anon979151
Post 1

Brewer's Yeast works. It has been several years since I had to deal with fleas and I'd forgotten how well it works. I use the nutritional variety (health food store) and if I can't get the powder I use the tablets and grind them up.

After three doses of about a teaspoonful mixed with 3 tablespoons of wet cat food, the fleas didn't just jump off; I am finding a few dead ones in various stages where my cats were laying.

I also called the company that makes the fogger that I also used and the rep suggested a hand-held spray for the closets. I'd already purchased one for hard to reach areas (under the couch and tv stand, beds) and the deck (where it probably started).

Another help is borax mixed with table salt worked into any rugs and left for 48 hours; also check for the eggs and larvae the animals leave behind and combing them at least three times a day. I've learned the hard way that if you live next to the woods or feral animals that your own pets need a flea treatment at least once a month! Or at least comb them a few times a month.

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