Generally, the amount you feed should be 2-4% of the adult body weight, depending on their activity level and such. A sled dog needs more food than our bullies for example. I feed my guys 1 to 1.4lbs of food a day. Any more they tend to get runny poops. Stig has been 46.8lbs for the last year or so and Punkin's steadying at 47.8 lbs.
How my guys started is a little different from what's usually recommended. We first learned about raw from their daycare owner and she said that, although it's different from the 'normal' steps, she noticed most of her dogs did well when she switched them to different proteins faster. She's been doing raw for at least a decade.
I started my guys with a chicken frame and green tripe. The frame is mainly for them to get used to the chewing and to control their bowel movements. The green tripe is to ease them into the transition and help with digestion - it also has many other benefits including being high in probiotics. After approx 4 days, I introduced another meat. Can't recall exactly which one, but most likely turkey (w/ bone). Then another couple of days, venison, and then goat the next (Again, can't recall the specifics). A small amount of organs were introduced during the protein change, which they both did well on.
As time went by, I reduced the amount of bone intake, trying to follow the 80-10-10 ratio. 80% meat, 10% bone, 10% organs (5% max liver, 5% any other organ).