
Good info in:
Grow your pups with bones- Dr.Ian BillingshurstThis is his second book and updates the first but has a second half which is 'Feeding for Breeding' :)
My personal opinion on this is that you should find a 'Mentor' in your own breed, there is no better substitute for this. (you need to hear the good and the bad, and similar to my breeds retiticence to talk openly about fights in harness there does seem to be the same in the 'BARF' world in relation to bad experiences, But to my mind the big picture is a good thing not a bad thing ;))
Meantime there is a yahoo group BritBarf which has some very experienced (longer than 5 minute experts you see cropping up on most forums ;)) members and the owner/creator of the site is a great chap who strives to give balanced accurate info :) You have to apply to join and it takes a while for acceptance but worth the wait.
Hope this helps.