I have noticed my cham has 2 white things on its nose, 1 on either side of his nose. I'm not sure what they are or how they got there. I will put a picture of this.
Please dont take this rudely: there is a search bar at the top of the page, hence where Im getting the info. It comes in handy. I have no issues helping and finding answers, but sometimes its easier to search than to try to explain to someone.
Them links did help as i read, there sayings it from to much supplement. Also it can be from the crickets diet. I have my crickets in a glass tank with lettuce / apple / carrots and water crystals.
Well I think supplmeneting also depend son how old the cham is. I know younger chams needs more dusting than older but then there is rumor that too much dusting causes kidney issues and not enough causes MBD.. Hard to know which side you are on.
I personally dust crickets every time I offer them. LIGHTLY dusted, that is. Crickets have a poor calcium to phosphorous ratio.
I dont usually dust the other bugs.
First I want to tell you that I commemorate you for wanting to know as much as you can about your cham.
You can white dust, but if you do, do it in moderation. Most of the time I dust about three crickets out of the ten I feed him, and you must make sure it's a dust with calcium WITHOUT D3. D3 should only be administered about 1-2 times a month.
My husband accidentally white dusted several of my crickets, and when it happened I held off dusting for several days. The best way to dust is grab a pinch, then rub your fingers together for about two seconds to release -some- and then sprinkle it on the crix you are feeding him. I know this sounds a little OCD, but it works.
If I offer ten crickets, then I dust about four of them. On the 30th of every month I use dust with d3. Make sure you are either gutloading crix with essential vitamins or are using a vitamin supplement every so often. A good way to gutload is feed crickets carrots about 24 hours before feeding them. Beta k is a good way of Vitamin A ingestion without the worry of toxicity in high amounts.
Since you've only had your cham for two weeks I might assume this was related to the petstore, but there is a chance it was because you were dusting them white. Hold on on the dusting for several days and then continue with the advice given by the people here. Your cham's conditions should improve.
I'm still unable to find anything about lizards expelling CALCIUM from their noses...its always sodium or potassium chloride. I can't find any proof for chameleons...but I would hate to see anyone cut down the calcium dusting so it is so low that the chameleon develops MBD thinking that this is going to correct the "white stuff" problem. This is just my own opinion and I have no way at the moment to prove it.
It would be very interesting if someone could take some of the "white stuff" that is around the chameleon's nostril sometimes and test it to see what it really contains.
This is a quote from one of my posts in one of the links that blackbetty provided...
Here are some of those sites...not about chameleons....but still about nasal salt excretion... http://bio.research.ucsc.edu/~barryl.../research.html
"The salt glands of lizards, unlike those of marine birds, sea turtles, or sea snakes, are unique in their ability to vary the composition of the secreted fluid, secreting potassium chloride as well as sodium chloride depending on dietary ion content."
https://ritdml.rit.edu/dspace/handle/1850/2517
"The teiid lizardAmeiva quadrilineata has a nasal salt gland that responds to NaCl loading by increasing excretion of Na+ (from 1.12 to 2.63 uM/100 gh), K+ (from 0.14 to 2.43 uM/100 gh), and Cl– (from 1.10 to 5.47 uM/100 gh). "
"The encrustation you’re seeing is merely the salt from your lizard’s body and nothing to worry about. Chameleons cannot sweat or eliminate salt as mammals do so they have developed this way as a means to do so."... http://www.chameleonnews.com/?page=article&id=132