Cats bury their waste in a litter tray to hide the odor from predators. This is a survival instinct. When they use the toilet instead of the litter tray the water in the pan hides the odor more effectively and the cat is satisfied. The Litter Kwitter leads the cat through three stages of behavior modification to teach the cat how to balance on the toilet, how to aim correctly into the pan and finally how to go without the need for litter.It fits all standard toilets and ships with a step-by-step training DVD plus a full color instruction book so anyone can do it. The special white seat starts on the floor next to the toilet with the red training disc full of litter just like their regular litter tray. Later, the whole thing is placed on the toilet rim so your cat learns to hop up to go. This take around 2-3 weeks on average. This award-winning product is sold in over 40 countries and has appeared on TV hundreds of times including BBC 1, BBC2, HGTV, Fox News, CNN and NBC. The LITTER KWITTER is a total cat toilet training kit that helps you toilet train your cat to use the regular household toilet. You can train your cat in 3-easy steps to use the toilet and say goodbye to the litter tray... forever! The award-winning LITTER KWITTER System was developed with vets, animal behaviorists and cat breeders. The device works with 3 color-coded stages to train your cat naturally.