We always used to wean pups with scraped beef (ie scraping along a piece of steak with a teaspoon which will give very fine slithers of meat) making it easier for the pups to eat. These days pedigree chum puppy food (tinned) mashed with a little water added is a great way to wean (never had a pup refused it) with nice solid poos, then gradually add complete if that is what you intend feeding.