Hello guys im new in the forum. I just got a new puppy. He is a piebald and red. He is 10 weeks and only weights 10 pounds. my questions is if he is just going to be small or he is under weight (in my opinion he looks underweight) or could he be a mix? He has the nkc papers. Today is my second day with him. Thanks for the help

It's good for pups to be on the light side. Rolly polly puppies aren't actually a good thing. You should not feel all ribs but feeling a rib toward the end of their cage is alright. Keeping to the light side help their joints developed with less stress on them. I don't see anything that screams mix but when they are young it's hard to tell.