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Pet Size

Don't know your pet's weight?

If you can't get them on the scale, try this super simple method:

  1. Weigh yourself.
  2. Weigh yourself holding your pet.
  3. Subtract the two numbers to get their weight.

Too heavy to hold? Your vet will weigh them if you ask (or may already have it on file if you call).


No Prescription Required

  • Description

    Pet owners will be upset to see their animal in distress, and fleas and ticks can be the same type of problem for cats as they are for dogs. You can give your pet reliable flea and tick prevention for cats with Catego, a once monthly flea and tick killer medication for cats that also prevents chewing lice and has a patented applicator for easy application. Catego starts to kill fleas on cats within 6 hours of application and kills ticks just as effectively.

    You can buy Catego for cats with a prescription and always get the best price when ordering this prescription topical flea and tick for cats as a solution from World Pet Express.


    Use scissors to cut along dotted lines and remove applicator tube from package. Hold applicator upright and then press down on the disc at the base of the applicator so that the two discs meet in order to break the seal.

    Part fur at the base of the cat’s skull and squeeze the applicator to dispense the topical solution directly onto skin. Allow Catego to be absorbed into the skin naturally, do not try to rub solution into the skin or touch in any way.

    Repeat once every month, and it is best to administer the medication at the same time every month.


    The active ingredients in Catego for cats are Dinotefuran, Fipronil, and Pyriproxyfen.


    Never exceed dosage guideline of one application, one time per month. See the vet again if you feel the medication is not working as it should.

    For cats 8 weeks of age and up, and at least 1.5lbs body weight.

    For topical use only. Avoid oral ingestion. Use with breeding, pregnant, or lactating cats only if your veterinarian approves doing so.

    Harmful if swallowed. Be sure to keep away from eyes, ears, nose, and mouth.


    There are no known drug interaction risks between Catego flea and tick for cats and other Rx pet medications. You should still inform your veterinarian about all medications your pet is currently taking before getting the prescription and proceeding to buy Catego for cats.

    Side Effects

    Side effects from Catego for cats are rare, but some cats may experience skin irritation, redness, or noticeable general discomfort. If these side effects are seen, then discontinue use and meet with a veterinarian to discuss other cat flea and tick prevention options.

    Product Code : 13511