To keep your neighbor's cats away from your home without leaving obvious traces, try these humane and discreet methods: 1. **Eliminate attractants**: - **Clear food sources**: Make sure there are no food scraps or garbage in and around your home that attract cats. Use covered trash cans and clean them out regularly. - **Remove potential shelters**: Check and clean hidden corners in your yard, such as piles of wood, debris, etc., to avoid providing hiding places for cats. 2. **Use natural scent repellents**: - **Citrus scent**: Cats generally don't like the smell of citrus fruits. You can place orange peels, lemon slices or use a spray with citrus essential oils in areas frequented by cats. - **Herbs**: Plant plants that cats don't like, such as lavender, basil or chamomile, which can be set up at the edges of flower beds to act as natural repellents. 3. **Install discreet repellent devices**: - **Ultrasonic repellents**: These devices emit high-frequency sounds that are inaudible to the human ear, which repel cats without disturbing humans. Choose an inconspicuous location to keep it beautiful. - **Motion-sensing fountain**: Using motion sensors, water will automatically spray when a cat approaches. Cats are usually scared away by the sudden flow of water. This type of equipment usually does not need to be installed for a long time and does not leave traces. 4. **Change the texture of the environment**: - **Laying materials that are not suitable for cats**: Laying double-sided tape, aluminum foil or thorny mats in areas where cats often go. These materials are uncomfortable for cats and can effectively reduce cats' visits. But make sure to choose materials that will not affect the environment or neighbors. 5. **Communicate with neighbors**: - **Friendly negotiation**: Communicate with the cat's owner and explain the trouble caused by the cat's frequent visits. Find solutions together, such as adjusting the cat's range of activities or providing other care measures. 6. **Use visual obstacles**: - **Blocking sight**: Cats like to observe the surrounding environment from a high place. You can reduce the cat's activity space and sense of security by trimming branches, installing low fences, etc., thereby reducing their willingness to visit. The above methods are designed to drive away cats in a humane and environmentally friendly way while keeping the environment clean and beautiful. It is recommended to use a combination of methods to achieve better results. If the problem persists, you can also consult your local animal protection agency for further help.