This morning, I woke up an hour before my alarm clock was set, after a crystal-clear dream about my snake being really hungry and needing to be fed. She's been very finicky this spring, but tonight she showed clear signs of being actually hungry. She certainly grabbed at tonight's rat, but she's taking her time swallowing it. I may need to try going down to smaller prey to see if that works better for a bit.
Last night wasn't the first time I had a strong dream that Charlie was hungry. Either she's telepathic, or I have a very sharp subconscious. :-)
Update: Nope, after mostly swallowing the rat, she spit it back out. I'll try something smaller in a couple of days, and if that doesn't work, I'll give the vet a ring.