All my indos are not stable at all, this has been discussed before with some saying that unstable means a good thing, and i'm leaning towards that, all my unstable indos are healthy and active, while the stable one in my observation is either threatened or somethings wrong with it. One of my largest indo was stable the whole week, lookin good but then it had some bladder issues. Though i'm not sayin that if it's stable it aint happy. It's just my personal observation.