Bob Martin Easy to Use Dewormer - Cat 1 x 3xscht. Bob Martin Easy to Use Dewormer Granules - Cat & Kittens A highly effective routine treatment for roundworm and roundworm eggs, suitable for cats and kittens. Clinically proven, simply sprinkle the granules onto your cat's food to help keep them roundworm free. There is no permanent treatment for roundworm. Veterinarians recommend that weaned kittens and adult cats be wormed every 3 months as a routine measure. For cats and weaned kittens over 3 months old.