ammonia does work to ward of cats, keep in mind it is a poisonous chemical and use it wisely. also some better approaches to warding off unwanted felines is sprinklers... or water hoses. if your there when your sneaky visitors arrive, spray them with water, this will more than likely reinforce to them that its not a pleasant place for them to be, and that they are unwanted there.
Mothballs are not safe ways to deter cats. They are fatal if ingested. Two safer alternatives are ammonia and vinegar.
Bring him/her to the vet.
Spray dog urine around the property.
cats do not like being wet, stray cats don't like being sprayed with the garden hose.
seeing as how cats urine contains a high concentrate of ammonia it is doubtful there is a plant that will dter cats but the name is lost to me at the moment.google deter cats naturally with plant
There is a few way to get rid of stray cats and kittens that is hanging around your house. The best way to get rid of them would be to call your local pound.
Stray Cats was created in 1980.
stray cats were stray cats...but since they were afraid of dogs...I think that you must have one
Find them a home. Shelters kill animals that don't get adopted.
The cast of Stray Cats Rock Tokyo - 1990 includes: The Stray Cats as Themselves
The cast of Stray Cats Rock Detroit - 1992 includes: The Stray Cats as Themselves
The cast of Stray Cats Rock Paris - 1991 includes: The Stray Cats as Themselves