
I think the single most important way to get them interested in food other than the milk bar is to take mum out of the way when sleeping so when they wake up hungry they don't have a choice :)
My pups (first litter) were started on weaning at 2.5 weeks so by four weeks were eating their puppy food (kibble) almost dry rather than soaked and had their first chicken wing tips :) I found they preferred food with "bite" rather than mush, perhaps you will too.
My girls second litter were eating whole chicken wings and a variety of puppy foods both dry and moist by four weeks. As to meat, fed raw, either scraped or double minced.
HTH, Teri