Counting your small fish

For your small fish, 2" or smaller....how many times do you randomly lose a couple?

Tips for figuring out if they're actually dead and someone ate them or if they're just exceedingly clever at hiding?

As in...you had 13 a few days ago and today you have 11. I've pulled up and checked all the hardscape. I have 2 missing little danios...I have a feeling they passed and my pleco got to them, but there's not even a couple of bones around to tell for sure.