Opening the lid, I saw the patty I had on top of the inner cover wasn't really touched yet. Lifting one side of the hive, it felt pretty heavy, much heavier than the other hive when I discovered it was dead. I removed the inner cover, which was covered with bees, and placed two patties directly on top of the frames. Since I dumped some bees down in front of the hive off that cover, I set a frame with some honey on it for them to climb back up to the hive, hopefully getting a little treat on the way.
The bees looked good, and there were large numbers of them, which is promising.
Unfortunately, the warmth this morning is the best we're going to do today and the thermometer will plummet to the teens tonight, with 2-4 inches of snow predicted and sub-zero temps tomorrow night. Such is Iowa. I'll need to go out later today to recover the frame.