<sigh>My seven year old female yodels throughout the night... very, very loud and simply unrelenting. Why oh why does she do this? I've had her five years now and its always the same night after night. Could it be she's not spayed after-all? I adopted her as a spayed female from our local shelter... she was a stray they picked up and they determined she was spayed by a previous owner. She also raises her hind end at the slightest touch and has a continuous discharge from her vagina. Anyone else ever experience this behavior?