No pebbles. The Viv has plantation soil and live plants and no additives in either. My male also lives with her but he's perfectly healthy. And my viv is custom made to hold 2 chams. With a solid separation wall between the 2.
I do have a dual cleanup crew. But the poops are normal on the outside. I opened it up to show the questionable bits. So I found the "egg like" on the inside of her poop.
I have a 6month old female veiled chameleon that has had a few questionable poops. They're normal other than these "egg like" things in them. She eats horned worms, cricket and other mixed worms. She is fed balanced.
I have only seen theses in like 4 of her poops since I got her in December...