So I've been thinking about the first time the little ones were first mentioned. That was when Kalani and Angel took out two Behemoths. One they had to drop a building on and the other was already laid out almost dead. At the time I always figured that the Behemoths duked it out for territory or the food in the warehouse, but now I think its something more.
So here's my first theory:
So I believe that mostly everyone thinks that Pinstripe is the tattoo artist putting numbers on the little ones. Also there are different types of zombies all over the place: smart, big, fast, swimmers and the normals. The only type of zees that have been confirmed to be with Pinstripe are the normal/smart type. What if he were breading them so he can control them when they turned to Behemoths.
So back to the knocked out Behemoth near the warehouse. He was probably ambushed some how by Pinstripe. Then Pinstripe took its blood and infected some kids brought from the hospital or something like that. Then they started their change around the military warehouse.
Here's my nature/naturalist theory (this is a way out theory):
I figure Behemoths are the Alphas of zombies. They have territory and their own packs, that being the normal zombies. You don't see packs of Behemoths running around the city after all. Anyway what if the National Guard Depot was a "mating/challenge" site. This explains why the area is cleared out regular zombies. Who would want to get in the middle of two big ones getting-it-on.
Each Behemoth brings an unchanged kid to the mating/challenge site. This is why there are only two little ones at the warehouse. The Behemoths duke it out and the winner/survivor infects the two kids and turns them into little ones.
Some how Pinstripe gets a hold of the little ones later on and tattoos them.
That's all I got so far, but what do you guys think?