As Marie and misslisa said growth is different for different chams but i only asked as when I got my baby boy panther I had trouble getting the correct basking temp and as a result he was quite dark a lot of the time (he was eating and pooping fine) but once adjusted he brightened up and started...
If you don't mind me asking what and how much is he eating, what supplements do you use and what are his basking and ambient temps and how often is he handled and mane a pic of his Viv.
My female once a year old also slowed her eating way down, after fecal tests and vets we learned that is quite normal but she also has a funal infection and salmonella (we got her at a year old and very quickly started to worry) so always worth going even tho it's expensive. A good way to calm...