I don't believe I see any signs of tracheal mites, I haven't been able to do an inspections yet, either. I've been feeding my hives Mann Lake Winter Patties and I just gave one of my hives some Ultra Bee (also from ML) in dry form. Should I make the shortening/sugar patties in the article and feed them that, too as a preventative measure? I could whip some up tonight and get them started tonight or tomorrow. Warm weather is coming an I want to make sure they're rip-roaring, ready to go!