Yes, there is a good chance your chameleons are dehydrated. Food type can also affect the color of the urates. What kind of feeders are you offering your chams? I read that you are misting the cage frequently. Are you using a water dripper as well? You may want to try the shower method to help rehydrate your chams if they are big enough. Improvements to your watering methods might be needed.It was a clump of half white and half orange...followed by a solid brown one of about the same size of the other clump. So if I am understanding this right...My chams are dehydrated?