Extremely Worried

My cat had kittens almost two weeks ago. She had them in a box in my closet they all seemed healthy. Last week she moved them to my oldest sons room that was ok I guess. Then today I go to check on them and one kitten is gone They are not old enough to get out of the box and my husband and I have looked everywhere. What do I do? What could have happened to the kitten? SOMEONE PLEASE HELP ME

Is it possible she started moving them to a third location?

It sounds harsh but sometimes if a kitten is sick or dies accidentally the mom will get rid of it, either by eating it or taking it far from the nest. This keeps predators away.

my cat did that in her last litter what i had to do was igrone her but watch carefully after about 30 mins i notice she keep going in my larder and she hide it in there