To keep the neighbor's cat from coming to your house and leaving no trace, you can try the following gentle and hidden methods. These methods are designed to use cats' natural habits to guide them to avoid without harming them or causing neighborhood conflicts.： --- ### **1. Eliminate the factors that attract cats** -**Clean up food sources**: Make sure that the trash can is sealed and does not leave pet food, residues or bird food (if you feed birds). -**Remove shelter**: Trim bushes, fill caves or crevices in the yard, and reduce places for cats to hide or rest. --- ### **2. Natural gas odor repelling (no residue)** Cats hate certain odors, but these odors are lighter or harmless to humans： -**Citrus**: Spray diluted lemon, orange or grapefruit peel water on the border (cats hate citrus flavor, but need to be reused after volatilization). -**Vinegar spray**: Mix white vinegar with water 1:1 and spray on the corner or doorway (no trace after volatilization). -**Coffee grounds or cinnamon powder**: Sprinkle on the edge of the flower bed (it looks like a gardening material). -**Lemongrass or lavender essential oil**: Cotton balls dipped in a small amount of essential oil and placed in a hidden corner (safe for cats, but need to be replaced regularly). --- ### **3. Physical barrier (invisible design)** -**Cat-proof plants**: Plant plants that cats don't like, such as rosemary, lemon thyme or prickly roses (natural and beautiful). -**Gravel or stones**: Rough gravel is laid on the fence or window sill (cats don't like to step on hard surfaces). -**Double-sided tape or aluminum foil**: Temporarily attached to the window sill or fence (cats hate claw sensation, remove it after a few days). --- ### **4. Gentle means of interference** -**Ultrasonic cat repellent**: Ultrasonic equipment for outdoor use (the frequency cannot be heard by humans, but it is sensitive to cats). -**Automatic water spraying device**: A nozzle connected to a motion sensor (such as a water-saving spray for gardening, it will only be triggered when the cat approaches). -**Sudden sound**: Put a can full of coins in the place where cats often appear, and remotely control the drop (to avoid direct confrontation). --- ### **5. Communicate with neighbors (the most fundamental method)** If you know the owner of the cat, you can politely remind： -Euphemistically express the impact of cats on your home (such as digging in the garden, allergies, etc.). -It is recommended that neighbors wear bells for cats or limit the time they go out. --- ###**Precautions** - Avoid the use of toxic substances such as mothballs and bleach, which may harm cats or the environment. -Do not hurt or catch cats, it may be illegal and intensify conflicts. The combination of these methods has a better effect and does not leave obvious human traces. If the cat continues to visit, you may need to be patient and try different combinations.