In short: using vinegar solution or white vinegar on your pet's fur or in their drinking water will not kill fleas. There is a chance ACV could repel fleas because they don't like the taste, but it is only a mild deterrent and is not the best flea remedy. ... Seek alternative natural ways to get your dog flea-free.

How long does it take vinegar to kill fleas?

Mix the vinegar and water in a spray bottle, and apply the mixture directly to your pet's coat. Finish by working it in with your hands, Allow the solution to dry; do not wash it off. After 20 minutes, you can use a flea comb to brush out any fleas. Repeat every couple days to maintain the effectiveness.

What kills fleas instantly?

The most common product used to kill fleas on dogs instantly is Nitenpyram, more commonly known as Capstar. This single-use tablet is administered orally and kills fleas within 30 minutes. It is recommended that you contain your pet in a small area when using Capstar.