Ugh, reckon I've got one of the smallest Coastal Carpets (for his age)...
I've had him since Feb last year, and was advised at the time that he was 9 months old, since then, I could almost count on my fingers how many times he's eaten...
I've tried so many different things suggested on APS etc, temp changes, substrate changes, room changes, food changes, food handling changes, food administration changes... and he just seems to be somewhat anorexic... He will eat, but just when he feels like it...
So he's currently at 70.2 cms at almost 2 years of age, (big thanks to the Herpmeasure software!), and I recently took on a bredli who has shared the identical type of enclosure, substrate, temps (Both in click-clacks in a larger enclosure) and the Bredli at roughly 10 months has just surpassed his length at 72cms, and is markedly thicker... Bredli eats every time without any hesitation... Coastal generally looks at the mouse/rat and seems to be saying, "Y'know, a bit of tofu would go alright..."
Aside from the weight/length issue though, he appears fine, active, strong, no mites etc, eyes and mouth nice and clean... just has the lean body perhaps the equivalent of a Kenyan runner...