[@Silverstein] Good Cs, with your bio you'd be born in the cave, what you could do is be hatched in the cave near a lot of sandy area in the cave. 

Anyway my main problem is the two dragons you've chosen is completely different. The baby has actual wings while the second one doesn't. The entire facial structure is different and yes, facial structures can change as you grow older but not that much.

Lastly your power, earth swimming you can do that anyway being a sand dragon. Even more so if you change it to an earth dragon so I'd reccomend you choose a different power.