Interesting cause my ball pooped first day I had him,think from stress and haven't since then . Then again yesterday for the first time I think it was cause he was nervous.. cause I had him out of the tank and my cats were hanging near me,so I think it was nerves..once he started pooping I put him in the tank cause I felt bad.. but irk he don't seem to go in his own..I did one time find something in the tank and may have been dried up poo,irk..other words he seems healthy