My chameleon is turning yellow. Is this normal or a health concern?

Are you sure he isn't going into a shedding period? Confirm proper environmental parameters, especially heat and UVB lighting. Low temps may cause stress which could cause him to become dull. Replace the UVB lights if older than 6 months. Mist him daily and use hygrometers in his enclosure to confirm proper humidity levels. Monitor for lethargy or decreased appetite. If necessary, have him examined by your veterinarian or a vet experienced in treating reptiles to diagnose illness or injury.

Yellowing may indicate a bacterial or fungal infection. Certain fungal infections can be quite serious, so an exam with your veterinarian or a vet experienced in treating reptiles would be recommended. If you can provide the species of lizard as well as an image or two of the lesions in a new post, we may be able to provide more comprehensive advice.

The color change may be due to stress or low temps. The dot could be liver or gall bladder. If he is behaving, eating and defecating normally, there is likely no cause for concern. Check enclosure temperatures and adjust if necessary. Monitor the spot for any change and monitor his demeanor. See your veterinarian or an experienced herp vet for an exam if necessary.

The dewlap should not feel hard or firm. There are variations in color, so the yellow hue may be normal or not. You need to have Edoardo examined by your veterinarian or a vet experienced in treating reptiles to diagnose illness or injury. In the meantime, confirm proper environmental parameters and diet. See your vet sooner if you notice lethargy or decreased appetite.

The white spot on your Veiled Chameleon's casque looks to be shedding skin that has not come off yet. Mist him with warm water to aid in shedding. It is common for lizards to lose toes. What likely happened was some shedding skin did not come off properly and restricted blood flow to the digit resulting in the loss. As long as it is healed up, there is no cause for concern. The darkening of his colors may indicate stress. Survey the area in and around the enclosure for any negative stimuli. This may include loud noises, strong vibrations, bright lights or cold drafts. Reduce or eliminate any if found. You can review chameleon care at the link below. http://www.reptilesmagazine.com/Care-Sheets/Lizards/Veiled-Chameleon/

Thanks for reaching out about Jabberwocky. Yellow runny feces is not normal, nor a sign of acclimation. A veterinary visit is highly recommended as this bearded dragon appears to be ill. Intestinal parasites or infection, metabolic disorders such as liver (atadenovirus) and other possibilities. Offer water and food through a syringe until you have a veterinary appointment. Good luck.

Thank you for reaching out about Hamlet. His feces look very normal in consistency. The color change can be due to his diet or how he is digesting his food. I would not be overly concerned at this time. I wouldn't continue to monitor him. You can also have his feces tested to ensure he does not have any parasites.