opinions pls

opinions pls....been told its on par with JWB just much cheaper
INGREDIENTS
CHICKEN MEAT MEAL,RICE,MAIZE,BEET PULP,CHICKEN OIL,OATS,BREWERS YEAST,FISH MEAL,EGG POWDER,WHOLE LINSEED,FISH OILS,MINERALS AND VITAMINS,GLUCOSAMINE,CHONDROITINE AND MSM.#
PROTEIN 30%
OIL 14%
Its a puppy food BTW
Many thanks

Seems to be a lot of `filler`. Maybe pups need it as they grow so fast?
Why oats and maize and rice?
The protein`s a mix as well, with chicken and fish. Both meal so it would be good to know what parts of the animal (or fish) were used - the whole animal or the low-grade bits left over from processing.

Why does a puppy need MSM etc. ? I give that to my old dogs. Do pups benefit as well? Just wondering.