The product works based on the territorial chain in the cat kingdom, when your mischievousneighbourhood moggy smells that the king of the jungle has been passed it thinks twice before entering the confines of your garden.This great lion roar product is based on pellets which have been soaked in the real essence of lion dung.In addition to its cat repellent properties, Silent Roar is a nitrogen based fertiliser which helps leaves to grow and keeps them luscious.Silent Roar is great for the environment as it has no harmful chemicals in it and an application of this fabulous deterrent will be effective up to three months.For best results remove previous cat mess and replace with silent roar pellets. If the cats continue to come back just keep playing them at their own game by removing mess and laying pellets. The idea is that the cats won’t want to compete with a larger predator for their territory. It is best to wear gloves to stop human scent being transferred to the pellets. 0.5kg.