I got the same problem! I know this post is kind of old but yeah... but in my case they had advertised 4"-6" and I put on my order that I wanted 6" and so they process my order and instead of telling me then didn't have any at that size they gave me 4 2" in hopes that giving us more will replace the size!!!! I tried feeding blood worms and it works but I dunno how to care for ones that still have the egg sac!!!!
Yeah like everyone else said, keep them on bloodworms and when they are about 1 month you can start pellet training.. just break it up and they'll eat it...