Actually, it is very bad to use food coloring in the hummingbird food. It takes days for the dye to get out of their system and even on small levels is dangerous to the little guys. Another thing that most Orioles love is jelly, grapes, and strawberries.As for regular bird seed and food, DO NOT use Scott's brand of bird seed. If 100 birds eat it, there is a chance that only a few can survive, here is an article about why not to:
http://www.guardian.co.uk/scie...
And a story from an aviary who used this seed: