I tried the basic premises (parsley water and a health food store-bought tincture of the 3 basic worming herbs) to treat my 3 cats and 1 dog. I could see that they benefited from just the parsley water itself and, granted, 1 cat absolutely refused the herbal tincture, even on his favorite food. I was able to work up to giving the dog about 20 or so drops of it, and treated the other 2 cats as recommended, about twice a week with just a couple of drops. I no longer see the little wiggly 'rice grains' around any of their anal areas or anything in their stool, and they are energetic and healthy-looking. When I mentioned it to the vet, she thought it was a wonderful idea and admitted it was much healthier than worming shots, especially if unknown if or what type of parasites.