is that your rescued Lemon Blast? regardless of age, he looks to have a healthy shape to him. i would rather have a older, but smaller healthy round BP rather than an older, long and scrawny one.

just keep feeding him on a steady schedule and he will grow. i have a 3yr old male that was about 350grams when i got him. the breeder kept him on a maintenance feed schedule and since i've had him for a few short months, he's doubled in size.