I'm going through the same issue with my 5 year old beardie! She keeps having very loose stool, quite smelly too. I can tell right away when she has gone poo. Has been tested twice for parasites but came back negative each time. I've tried switching greens, more bugs less salad, removing certain veggies. Nothing seems to be helping. She acts normal but I just feel like having such runny stool cannot be good!
Also got some bee pollen powder. Lots of people sprinkle it on their beardies veggies. It's naturally packed full of super healthy stuff like amino acids, antioxidants, etc. You can buy it off the same website as the first link I provided. Hopefully this helps!
Just to update everyone, and anyone who stumbles upon this, Xena had her first log poop in about 2 months!
I truly believe it was the light fixture. I updated from a zilla slimline fixture and bulb to the zilla slimline fixture mounted inside her tank (with the plastic lens removed) with a reptisun tube instead and in about a week and a half she had a normal bowel movement.
Thanks so much to everyone who gave suggestions. Our girl is on the right track to getting better!