Could you see that little crest right after they fluffed up? So far I don't really see one on either of mine
Here are my spitzes when they were about 10 days old. That's when I 1st saw a hint of poof - but still not a real crest until between the 2nd & 3rd week.
2wks...... then a pic of 5 weeks! (Of course by then you'll be going crazy trying to figure out genders! LOL)