Hello Everyone, I have about a three month beardie, I was using paper towels , but have now put in a substrate liner, that has like rocky pieces on it. I have tried to brush all the loose pieces off, but i'm worried he may pick up some small particles when chasing his food. Im thinking of going back to newspaper or towels until he gets to be an adult, then put the rocky substrate back in. What do you think? How much would he have to ingest to get impacted?