Our place we never see them,we have 3200M square,and a Springer that seems to either save them for when she is out getting some exercise,which is at least once a day,or does them way down the back in a section of bush that is down at the back of the yard.
The vet also said never feed them the cheap food,as its full of fibre,ours gets the food with around 2% fibre,and its not the fancy expensive stuff either.

