Flea tablets are small easy to use and a highly effective method of killing fleas. Used instead of a flea spray or shampoo the effects are almost immediate and will provide welcome relief from fleas within 24 hours. The tablet can be given direct or hidden in some food and is suitable for adult cats and dogs pregnant and suckling mothers as well as puppies from 4 weeks. Kills fleas fast. Starts killing fleas in 15 minutes. Kills 100% of fleas in 24 hours. Bob Martin Flea Tablets For Cats Small Dogs & Puppies Under 11kg.