Sprinkles has been with me since he (?) was 2 inches, snout to vent. He's attained significant length and width in the 2 months I've had him. Great eater. Loves his cave. I'm assuming he's a he, because I've heard him call/croak, completely unprovoked, late at night 3 or 4 times; it is a low(er) gurgling/rumbling "urrrr" sort of sound. I understand that females are capable of making noise, but not of the aforementioned nature, to my knowledge. I welcome the opinion(s) of those of you who are more experienced in sexing these frogs - based on head/size proportions and such - when they're still quite young.