He should be on proper dog food by now, something like a premium dry food for puppies -Nutro for example. You should wean him onto that over a period of about 10 days. He needs to be getting hard things to bite on not all soft wet food.
I would look to feed him at about 8.00am, 1.00pm - 2.00pm, then about 6.00pm - 7.00pm. I'd halve what I was giving him as supper for a few days then halve it again then just stop it.
What ongoing diet has your breeder recommended as we'd normally advise you follow that - but only if it's any good of course.