Who taught you how to do a monitor setup? You can't just throw a cage together and call it a day, husbandry needs are very specific.
Check out our site, the Savannah and Ackie caresheets and articles. Those cover the basics as far as temps (your most important factor) diet, substrate etc.
Get a copy of the Savannah Monitor book by Bennett and Ravi, available at our site as well. NO OTHER Savannah book will do. The Bennett and Ravi book covers proper husbandry in very good detail, and applies 98% to your monitor species.
Vision cages are terrible for lizards, they simply don't allow for a proper setup. And given a proper setup, your Argus is going to outgrow that particular cage in one month. They get big quickly, but most of all, they are extremely active. I would suggest an 8ft cage as a MINIMUM for an adult Argus (like 8x3x3) and with a proper setup, that will be within 12 months time.
They are also very resilient, but having a monitor that eats so infrequently is not a good sign. It is not that your husbandry and setup is less than ideal, your monitor is really suffering right now. Get your setup up to speed asap and you can get back on track.
Our FAQ has tons more info on caging, setups, diet, temps, bulb wattages, etc.
Best of luck.
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robyn@proexotics.com
ShipYourReptiles.com
Pro Exotics Reptiles
