4 new FBT-have a few ?

[IrishRonin]

So I got 4 FBT, mail ordered from my feed supplier (crickets,mice,substrate,ect.) I don't like to do it that way as I cant pick them out myself but never really had a problem b4 so i figured it be ok. I have them set up in a 25G long tank split 50/50 water/land. So i noticed one at first, then when I took there pic it was two, of them are fatties. I'm not to worried but I know that they shouldn't be bloated. So I just asking for FBT keeper opinion on this, is there something wrong with them or could they just be fat, or could they(especially the dark one) be gravid females? Thanks for any help you can give. 1st ones there tank (with waterfall on left) 2nd one is all 4, 3rd one is the one dark FAT one, 4th is how I textured the outside of the tank where the foam meets the glass- Not sure why the water looks so grimy in the pics its crystal clear in real life