Ok, I'm stumped without getting a video camera on my chins...
We have had a barking issue ever since we got our girls from the breeder. Considering that they both had horrid breeding experiences (the males beat them up pretty good, and the breeder decided to take them out of the herd due to the stress), I figured at first it was just a fear thing, or the fact that it was a new environment... but they will randomly bark durring the day and evening hours (it doens't happen every day though).
We took them both to the vet, and Dharma had a nasty ear infection. We got drops, as well as arthritis meds for her, and i chalked the barking up to painfulness. But the infection is long gone, and we stopped the arthritis meds to see how she would do, and she's fine (she was fur chewing excessively, and she's doing that minimally now as well as moving around much more freely even without the glucosamine). But we still get the barking.
The minute it happens one of us goes to check on them. We don't have a dog or cat to terrorize them, and we keep loud noises to a minimum. Temp is usually 71 F, they have pleanty of stuff in the cage, and they don't fight. Anyone have any ideas? My boyfriend made a remark about it being a ghost.... and I'm starting to wonder (silly though it is). Does anyone know if chins dream? I'm wondering if it's nightmares...