has your dog not noticed or heard anything. was round gf's last night when her dog started going mad at something in the garden. probably just a fox but the light never came on so was quite a way away. and hes never that bothered by foxes etc

anyway id suggest changing the locks or someting on your gate or something silly like a sign saying fuck off.

anything to let them know that you know their about

just think he might be after your car keys!