Baby Smolder Drakes don't grow their spines until they get older. The color of which is usually determined by the color of their tail-nubs.
Baby Smolder drakes, though adorable, are still able to produce intense heat and steam. Due to their soft, thinner hides, their tummies appear to glow from their heating bladders.
chubby babies they are...
Smolder Drakes and art (c)