I've heard of several different stories of ball pythons changing colors for no apparent reason. Usually, they will regain their old color over a span of months or a year or so, gradually with each shed. But not always. So far as I know, none of these sorts of color changes have proven to be genetic, but I haven't heard a lot of follow-up on breeding projects. My thought is that some kind of big hormonal imbalance sets off the change. I don't think a regurge would cause such a change, but some issue with the overall condition of the animal may have caused both the regurge and the color change.

It is unusual to see two such cases in such close proximity to each other...and makes me wonder if something environmental caused the snakes' chemical or hormonal levels to shift significantly?