If you can find it, get some Creolin and make a spray and spray it around the outside of your garden. Animals of all sorts hate the smell and it is toxic to them (and us so be careful) I'm on my last 100ml or so of it here and afaik no longer available in Canada.
Some dog hair in a pillow case hanging nearby is also effective, if you're okay with hanging dirty doghair bags around your garden.
And of course, the classic pie plate on a stick deterrent. Works with mixed results