Thank you both very much for your responses...I've been worried sick about him, I've seen so many younger than him that are already massive and he is just this tiny little bean. I've been worried sick trying to figure out what I've been doing wrong, and I guess I was scared he'd stay this small forever and...yeah. But it is really awesome to know that chances are it won't adversely affect him in the long run. I guess I'll keep doing what I'm doing and checking how much he's gaining and keep on keeping on. Thank you very much!

Even though he's an absolutely terrible feeder and a little pain in that area, I'm so glad I ended up with him, anxiety and constant worrying and all. With all he's been through he's never once bitten and he is the sweetest little guy I know. He tolerates all of my anxiety-induced shenanigans.

This is him.