thanks for the advice, guys. I only have one kennel and it's usually reserved for the puppy in the daytime, so she gave me "the look" when I told her to get in at bedtime, but I gave her a special toy, closed the door, and went to sleep to the sound of silence. In the morning I found her sacked out on the couch, as I hadn't locked the kennel. Hopefully this continues to work and eventually she can graduate back to free range.