Thank you for waiting. First of all, chameleons are among the most delicate of lizards, and once they get sick, they seldom survive without veterinary care. Many times, there is a vet closer than we think, and even if not, a local vet may be willing to work by phone consultation with a reptile vet. Please give me your zip code so I can check on vets for you.
I suspect you got your information on care from a pet store. Unfortunately, that information is usually wrong. It's not your fault, but some things are wrong in your habitat.
I'll start you out with a first aid measure to help rehydrate your chameleon. giving anything by syringe or force-feeding si very dangerous, despite what you may read. It often leads to aspiration into the lungs, and a life-threatening pneumonia. Instead, buy some unflavored Pedialyte (yes, the kind for human infants). Prepare a shallow bath consisting of 1/2 water and 1/2 Pedialyte. Add a spoonful of plain powdered calcium and mix it in as well as you can. Soak your chameleon for about 20 to 30 minutes twice a day. Reptiles can absorb the electrolytes and fluids through their vents, so make the water deep enough to cover the vent.Be sure to supervise very closely.
You have been given incorrect information on temperature. The cage is cold, and that alone will result in appetite loss. Chameleons are adaptable to temperature extremes in their wild habitat, but there they can move around to find warmer or cooler spots. In a cage they have no choice. After months of being too cold, illness often develops. If this is a veiled chameleon, I'll give you proper temperature ranges. If he si some other type, let me know right away and I'll provide that information for you. Use a digital probe thermometer to measure temperatures. The ambient air temperature in the cage should be near 89*F. The coldest part of the cage should be 82*F. There should be a warm basking area that is kept at 90*F to 104*F. That sounds hot to us, but to a chameleon, it is just right. at night the temperature can be allowed to drop to 71*F to 79*F. You can adjust the temperature by raising or lowering the fixture or by changing the bulb to one with higher or lower wattage. If you have to lower the fixture, don't put it so low that your chameleon can touch it and be burned. I suggest that you read the information on this reputable site for more advice on care:
Remember, if your chameleon is not a veiled, let me know so i can provide correct temperatures for you. I've given you information or the veiled because they are most common.
It's extremely important that you buy a new UVB light. One with an output of 5.0 is far from adequate for a chameleon. In addition, the coil types are very unreliable. You want one that puts out 10% UVB. A Reptisun 10.0 (in a straight tube) is a good brand that does. If you choose another brand be absolutely certain it provides UVB rays. Don't take the word of pet store personnel, but read it for yourself. Full-spectrum, DayGlo, daylight, UV, and UVA are NOT the same thing. I'm putting a lot of emphasis on this because it's crucial to a reptile’s health. Without this light, Metabolic Bone Disease (MBD) will develop because they won't be able to produce vitamin D. Vitamin supplements are not a good replacement for the proper lighting. MBD causes a very slow and painful death. UVB bulbs must be replaced every six months as they lose their effectiveness after that, even though they may still look fine. Your chameleon is already exhibiting signs of MBD.
The heated rock the pet store sold you is useless and dangerous. Many lizards are seriously burned on them because most lizards don't sense heat very well from below. You can read more here:http://www.anapsid.org/hotrock.htmlhttp://www.herpcenter.com/heat-rock-dangers-video-108.html
Let me know by clicking on REPLY if your chameleon is not a veiled, if you have more questions, and to give me your zip code. I strongly urge you to let me try to find a vet for you. No matter what you do, I hope your chameleon will be fine.
(If you find my answer helpful, please click on the green ACCEPT button. Thank you.)