As with switching kibbles, it is advisable to switch gradually over the course of a week or two. However, some dogs will tolerate an immediate switch from kibble to raw.
As with us humans, dogs' digestive sensitivities differ greatly, so you need to choose the approach that you feel will most suit your own dog. Any change in diet has the potential to cause gastrointestinal upset. Often when this occurs, the instinct is to blame the new diet, rather than the method of transition.
Slow and steady: on day one, feed an 1/8th of your dog's meal as raw, with the remainder being their usual kibble. Each day or two, gradually increase the proportion of raw - 1/4, 1/2, 3/4, 7/8, all.
Raw and kibble can be fed together, contrary to popular belief.