Methods such as sterilization/population control, collars with bells, geographical isolation e.g. islands just to name a few. Why should people lock animals (cats or dogs) inside all day to suit people, with no tolerance? Lets lock those people inside and see how they "deal" with it? Not very well I can imagine? My question is then why should a non dog owner, who has cats or not, have to put up with dogs doing the same thing or worse? What it comes down to is Cats VS Dogs. Some people like dogs and some cats, some both and some neither. Lucky for them all they have the SPCA and other organizations.