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Question from Susan Harkins

Can one use Frontline Plus for cats for dogs?

Our Vet Says:

Frontline Plus has the same ingredients for cats and dogs but the quantity is different between the two species. Both products, Frontline for cats and Frontline for Dogs, have fipronil and S-methoprene as their active ingredients. As you probably know fipronil is a powerful insecticide which will kill all fleas and ticks, and S-methoprene is a growth hormone regulator which breaks the fleas life cycle and stops a new generation of fleas from being born from the eggs and larva found on dog or in surrounding environment.
Below is a small table to make it easier for you to spot out the differences.
Frontline for cats
Frontline for dogs
Active ingredients
The second problem is that a small dog will  need 0.6 ml solution and a cat pipette has 0.5ml, which is very difficult to measure for a dog pipette because they do not have any gradation on them. Theoretically for your dog of 50lbs you need 2.68 ml for one treatment, 5.36   pipettes of 0.5 ml
Overdose application of the product will cause a sticky appearance of hairs at the treatment spot. Among the rare adverse reactions are  transient skin reactions at the application site (scaling, local hair loss, itching, redness) and general itching or hair loss. Excessive salivation, reversible nervous signs (increased sensitivity to stimulation, depression, other nervous signs) or vomiting have also been observed after use.
In conclusion you have two reasons not to use Frontline for cats  on your dogs: price of treatment and risk of overdosing. I would like to advise you to look for a flea product for dogs, there are other cheaper products available.


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On your site you sell both FRONTLINE PLUS FOR CATS and FRONTLINE TOP SPOT. Can you please explain the difference so I know which to purchase...?

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