REisling may have gotten mixed up and grown in a winter coat! This would account for the color change, the extra weight (fat to help keep warm in the winter) and the lethargy- too much fat and a thick coat making for a hot fuzzy! Sometimes our domestic beaties do this as their light- our electricity, doesn't rise and set with the sun. If they spend a lot of time in the dark, or darkishness, that could be a cause- or just that they got 'confused'. There isn't much you can do, except help keep them cool, and if she starts to shed, help by patting or brushing her a lot. :) [Posted in FML issue 0867]