Seven to ten days suits most dogs moving between two similar foods. A doodle with a history of loose stools, or any switch that changes food type rather than just brand, needs longer: two weeks is a reasonable floor and a move to raw often takes three or more. The gut bacteria need time to adjust, and rushing is what produces the diarrhea people usually blame on the new food.
Usually loose stools or diarrhea within a day or two, sometimes with gas and a reduced appetite. The new food is rarely the problem; the speed is. The gut microbiome is adapted to the old diet, and swapping it out in one meal leaves the bacteria unable to digest what arrives. Slowing down and going back a step almost always resolves it without abandoning the new food.
Not in one step, and not usually straight from kibble. Kibble and raw digest differently enough that a direct jump is one of the most common reasons raw transitions fail. A cooked middle stage between the two gives the gut a gentler path, and the process is better measured in weeks than days. Food safety handling also has to be in place before you start, not after.
Go back to the last ratio that produced normal stools, hold there for two or three days until things firm up, then advance more slowly than before. Do not restart from scratch and do not push forward hoping it settles. If diarrhea lasts beyond about 48 hours, contains blood, or comes with lethargy or vomiting, stop adjusting food and call your vet.