Hey i have both veiled and panther chameleons, ive seen this on both before and diffrent times. from what i heard its okay. also depends on what you fed them like some worms are known to make them slimey. but of course i am no vet and i could be really wrong. =)
looks like good hydrated poop. i have seen all different kinds of variety of poop...there is always a solid brown/black section..thats the excrement and the white top is the urine. it looks like a healthy dump good job i have heard charlie dump so loud one day i thought my kids spilled something then i go in there nope...huge dune running out of his cage