why would you add kibble?
kibble is full of things that dogs are not naturally meant to eat - hence dog poo being a big bloated stinking mess that comes out several times a day.
when you raw feed dogs go once or twice a day and pass a very small, solid stool.
you'll find it's cheaper to source otherwise in the long run if you decide to go raw.
an example of what my dogs eat: i buy frozen chicken carcasses (40 in box for about £10) and i also buy, when available, duck carcasses which are huge and seem much enjoyed. i buy packets of pigs liver from tescos for 80p. that's the basis of their diet. my small lab will eat on a common day say 3 chicken carcasses, or equivalent in duck, a little bit of liver and a few times a week she'll have a raw egg and once a week fish. i would say it costs me £1 a day ish to feed her and she is so healthy, shiny and perfect teeth (bones) and ecstatically happy to be fed compared to when she had kibble.
i also have a small dog - a lhasa who also eats raw and she was the trigger for going back to it actually as she has crowded teeth that were getting grim and ready to cost me a fortune if things continued - eating raw has made such a difference to the state of her teeth and both of them are way less itchy and happier.
you want a good mix of meat and bones, fish once a week, eggs a few times a week and then you're fine. i'm not overly strict about so, for example, i cooked spag bol for all of us the other day that was disgusting and so plenty of leftovers and the two of them had cold spag bol sauce and left over pasta for breakfast the next day. another example i defrosted casserole beef that had hidden behind something in the freezer for an age and i wasn't sure would be ok for humans the other day - it looked slightly funny once defrosted so i gave it to the dogs and they loved it.
mine are oddballs who like things like apple cores (take the seeds out) or the end of a carrot or the end of the cucumber type 'treats' so they have a bit of that sort of thing purely because they want it rather than nutritional needs and they do get the odds scraps and leftovers from meals.
you honestly can't do WORSE than kibble when you really look into it. so it's crazy to worry would i get it right, are they getting enough x, y or z by raw feeding when we KNOW they're getting a hellish load of crap they're not designed to digest with kibble.
go for it. you'll get pleasure from watching how happy your dog/s is/are to be given what is right for them.