leftover honey

I had 2 hives die off after January. They have a good 100+ lbs of honey. Diagnostics from Maryland indicated <3 mites per 100 and 6.4 million Nosema spores/bee in one; 10 million Nosema spores/bee in the other. I'll start drenching my other hives with Fumigilan-B, but any thoughts on feeding...