Puppy not eating

I have a 9 week old Staff pup, he has been fed on a few different feeds now as he just seems to go off things! I've tried him on butchers wet food (as this is what the breeder was feeding), pedigree puppy pouches (he ate this for approx 2 weeks!), wainwrights wet food and i gradually started adding more and more wainwrights puppy biscuits into the meat. He will not eat his food if it has dry biscuits in it! (i've tried all combos!!)

I have even tried adding small chunks of cooked chicken but he would just pick these bits out and leave everything else! he goes mad for chicken but obviously its important for him to have a balanced diet due to his age.

What are the best brands of dry puppy food to use?
Also what are the best brands of wet puppy food as i don't know whether he's just not ready for the transfer to dry just yet.

ideally i want him on dry food asap but wainwrights mustn't be tasty enough! lol

For wet food id recommend natures menu i would feed my dogs tins at all they have no nutritional value whatsoever and are full of soya, when u introduce ur pup to new food do do gradually adding more of the new food each time changing their food too much upsets their stomach too much. If u go to the diet and nutrition section someone there will help u better.