Petco isn't known for giving good information - they tend to sell you the wrong things - use calcium (without D3 or phosphorus) at nearly every feeding, multivitamin once every 2 weeks, and calcium with D3 once every 2 weeks. Lots and lots of new members start off in the health clinic with a sick chameleon because they don't use the right supplement. (too much D) or none at all- because they were given bad information. He's a really great looking guy - I'm pretty new with all this stuff myself but I've had really good luck following the care sheets and paying attention and listening to the advice of the old timers on the forum- I'm glad I found this place early in my searches for information -