Depending on size and type of animal getting rid of them can be done in humane ways. Raccoons are an example of a troublesome animal that many home owners believe can't be dealt with in any other way than trapping or killing, which is both unfortunate, and ineffective. Getting rid of raccoons can be done by stopping them at the perimeter, but they are smart and a combination of methods such as described here http://raccoondeterrents.net/tips-to-keep-raccoons-away-from-garden/ will have best effect.