How much should I be feeding a 1 year old veiled chameleon?

He seems to eat and eat and eat and never stop.
Answers:
Veileds can be disposals. so you might want to regulate their food to a certain degree.

Over the years we have had hundreds of veileds (seriously, we had 400 hatch one year). What we have found is that if they eat too much, they will outgrow their bones. Let me explain: their body weight is too much for the density of their bones to support. If this happens, MBD can occur, and that is not what you want to happen.

Even if they are getting sunlight or plenty of UVB and UVA lighting - they can still get MBD if their bones cannot support their body weight. We have seen this in chameleons (veileds mostly) and bearded dragons.

Sinced veileds come from desert regions (Saudi Arabia and Yemen), and they live in the brushy areas of river beds (wadis) to find insects - they don't have what we could consider a "plentiful" feast. So, instinctively, they will eat every bug in sight. For this reason, we choose to regulate their intake. We offer an average of a dozen crickets or that sized insect per day. Some days, they get fewer; not every day do they get fed. Remember - in nature - there is no one delivering their food.

If you do some research on the web, you will find that many chameleon breeders recommend a structured diet until the veileds are adult - and don't forget the calcium supplement (dusted insects) twice per week to help bone strength.

Once veiled are adults (2 years+), we let them "pig-out" once in a while. Their bones should be well formed by this time, and the less frequent calcium dusting is maintenance.

Enjoy your chameleon!