Cats need a holistic diet of raw meat and cooked vegetables at other times with lots of antioxidants added to the diet. Cat need meat but not that chemicalised commercial crap. I put my dog on a home cooked/raw diet and her doggie cataracts have cleared up and her coat looks great. My sister does a neem oil flea dip at a fraction of the cost of a vet.
Our new kitten has signs of fleas. How does your sister do her flea dip?