if the only problem was the ammount of stool with the raw diet then you need to find a happy medium between raw and kibbel.
sounds easier than it is i know.i give eggs,fish,offcuts of rabbit/geese etc(cooked) a bit of all sorts really.if the terrier and staffy seem to be a bit podgy then the lurcher gets his alone.this works for us.
as above a good mix of fats,carbs ,proteins and veg
hope it works out for you.
atb