esshup,
Dont let the worry of a hsb losing a little weight over the winter keep you from enjoying them all spring, summer and fall!
Their metabolisms slow down to the point of not really needing much to eat to sustain life. When i keep fish in a tank in cold water below 50's they dont hardly ever eat in 2 months, bump the water temp up to the 80's and they will die in like 2 days without food.