While some say not to feed both kibble and raw, as long as you do so at different meals, it's fine. Many dogs can and do eat kibble AND raw. Most dogs that get diarrhea when switching to raw (detox), will get it irregardless if they are fed kibble or raw at the same time, or go cold turkey. I know people who feed kibble at breakfast and raw at night.
As for the grinding- there is no need! That's the wonder of RMB's (raw meaty bones). They satisfy the natural urges to chew, provide much needed nutrients and clean teeth at the same time. This week Lucian is having chicken quarters at dinner. You can feed any kind of meat- chicken, beef, fish, lamb,turkey, rabbit etc... Here is a good calculator to help you figure out amounts.
http://www.raw4dogs.com/calculate.htm