You never know
after having neuter and spay, pups can gain some more weight too! Haruka had hard time eating when I got her, but now she eats like a pig! Even she is still small, I am happy with her body structure because she looks very healthy..
SO whatever the size your pup is gonna be, being healthy will be the most important thing. Also nobody can predict the weight for your pup!
because only god knows
So no worry!