The vacuum! Emmy hates it. She barks and chases it; I usually try to just put her up when I start to vacuum. I don't think Oscar really cares about one way or the other.
Emmy also HATES anything that plugs in (that she can SEE that I am plugging in)--mixer, blender, toaster, phone charger...but anything that stays plugged in is okay--lamps, coffeepot, can opener, etc. She is a crazy little lady! She also goes wackly when I dust--it seems she is afraid of the dusting spray and dustrag! I don't know?!?!?!?!?