
You have already mentioned that you are happy to use raw so why not halve your kibble quantities by using more raw, your poo's ( I mean the dogs ) will become firmer too, as you must have noticed.
Does the size of poo bother you, unfortunately if you use a cereal based product made with bulky cereal, the waste bulk has to come out at the other end in some shape or form !
Do you have a local butcher who you can aproach and ask for some of his waste, I have 2 locally who I aproached as a total stranger,and now sometimes get more than I need, so anything that is not suitable I mince and put out for the wild birds.
Our butchers in this area have to pay to have their waste removed weekly and are more than happy to give me a couple of buckets full each week!
It must be worth a try !! :)
But as already mentioned you are bound to get many opinions with this type of thread.
Good luck.