I've decided to go for the "light" option, rather than fasting - which is good, i dont have a problem with it, and once we get going may well do a fast day per week.
Have whizzed up some broccoli, carrot, celery, watercress, natural yog, and very lightly poached some white fish to mix in for this evening. It will only be a small amount, and should not be too difficult to digest, will try her on some raw meat with the same veg mix tomorrow.
I havent bought her any Spillers or even biscuits as i had originally planned, because i want her to go straight on to BARF just hope she approves!