i have a female veiled chameleon about one and half years old but it seems quite small it is about six inches long from the tip of the nose to the end of the tail. she always eats and drinks very well.
Are you sure it is 1.5 years old? My veiled grew up to 6 inch when it is 3.5 months old. How long do you have her for? There might be something wrong with the setup and husbandry if she is that small. Here is a link...follow the instruction and list everything. We will try to help you to get her bigger and stronger. Do post a picture of her as well if possible.