I've fed my pup raw from about 6 months but will be having pups next year and they will be weaned onto raw at about 6/7 weeks. Start with mince and tripe and then on to chicken wings and chicken bones. Once they get the idea there's no stopping them. Just keep an eye on what comes out the other end. It its a bit too solid and they are straining, theres a bit too much bone going in, could add some boiled veggies (have to be boiled not raw as they cant break it down like we can).
My dogs have never looked so good ad they do on raw meat. Fantastic coats, muscle up well and fit as fiddles :-)