When raising a baby crystal wyvern.

Depending on your map settings, your baby might not even need to be fed! It also depends on your baby's lvl anything around 200 or up should not need to be fed more then once if at all.

It's better to feed it when it's almost starving 100-200 food.

Also stay calm! Over reacting is a no no, being a "Helicopter Parent" from my experience it usually gets the baby wyvern killed. It's better to lean on the "survival of the fittest" even if it's a little cold.