I understand the concentration needed for each species - but 4 cc's (or ml's) for a typical 8 pound cat is - problematic. The taste of Safeguard suspension, same Panacur 10% concentration, (yes, I've tested it myself to see what the palatability for my cat might be), and it is very salty and very unpleasant. One would have to refill a slender 1 ml syringe with the stuff, while keeping the cat ready for the next shot, and again, and again. After the 1st - good luck. I've tried mixing it with canned cat food, infant chicken puree, hairball malt gel, and all it does it render it a larger portion you must get down the cat's throat. For this reason I stick with Pyrantel Pamoate liquid for roundworms, and the combo pill Drontal (doused in a bit of infant puree) for Roundworms and Tapeworms. Pyrantel Pamoate has the benefit of being acceptable flavor to pets for some odd reason (it's similar to a mild banana flavor which I quite liked myself ). Cats shouldn't like banana, but I suppose it's at least not shockingly bitter or salty that immediately makes them rebel.I found two different dosage levels. 1 cc per two pounds of cat. Orally. Three days in a row. or Panacur 10% is a white oral suspension of fenbendazole as a ready to administer oral anthelmintic for domestic dogs, cats, puppies and kittens. 1 ml contains 100 mg active ingredient fenbendazole. Dose of 1ml per 1kg bodyweight as a single dose for routine worming. Google Panacure dosage for cats and read all the information.