Here at Gunfield we rear our puppies on a natural raw diet  we do this as 21 years of breeding and trialing many foods from the cheap to extortionate that raw comes out top , we feed Natural Instinct this come packed in a tub you simply defrost and decant no messy mixing or prep.
We would recommend any owner keeps their puppy on a raw diet as it has many positives

No added colours/chemicals

Reduced stool volume

Less offensive smelling stools

Palatable for fussy eaters

Studies show reduces the risk of some allergies

It does of course mean you will need more freezer space and it can cause an issues when holidaying.