[albert]

Katie,

There is quite a bit more information you could supply to help identify if there is a problem - size/age of axies; information about the set up; what you feed and regularity of feeds; etc.

Anyway - doing a water test can't be a bad thing and will help to identify if there are problems with water quality. I would also say, in my experience, leucistic axies gills can change significantly in colour - and before feeding they can look quite drained but following feeding flush with colour; so although what you describe sounds a bit on the extreme side it isn't something I'd be overly concerned about - at least in the short term.

Zoe beat me to it - but two suggestions to not worry too much for the moment is hopefully sufficiently reassuring.