At 10 weeks old your male puppy is a bit on the light side.
What size were the parent's? Did you get him from a COE breeder? What did your breeder say?
Eukanuba is not a great choice of food, and most vets really know little about nutrition...they push the brand that they sell, or what they know from watching t.v. commercials.
Do some reading, and you will find the most popular foods are foods that use human grade meats, few grains and no fillers or by-products.
Innova, Canidae, California Natural, Wellness, etc. are all good foods.
Gina