Pure Balance

Pure Balance puppy food

We have a new puppy in the house from a rescue and the breed is unknown, we are waiting for the DNA tests. The shelter thinks he may have some German Shepard mixed with a smaller breed, possibly Beagle, (he has the howl). We adopted him at 8 weeks old and 10 lbs. He is now 10 weeks and at least a couple of lbs or more heavier. He is very active and playfully aggressive. He has been eating Pure Balance puppy dry kibble food from Walmart for two weeks with no issues and likes it. He did however throw up for the first time in the middle of the night which we will monitor and tell our vet. He has some dry skin or dandruff in his coat now too. My question is can I continue with this puppy food, it is priced lower than a lot or is it poorly rated?