Thanks for all the replies, she had a checkup about a month ago and the vet said she was (despite her age) in good shape. On the chance it could be aches and pains, since she's a pretty stoic dog, I gave her a tiny aspirin before bed and she's slept quietly two nights in a row. This might be the solution, but time will tell.

I still believe she's got her wits about her, she usually acts confused only after it rains and her "map" of the property is erased. A day later, she's back to it.

I'll keep you informed.

Greetings to all Basenji fans,

I have two older basenjis and the oldest (almost 16) has started a disturbing behavior. She circles as if she were going to lie down, but only sits for a moment and then starts over again. If she does lie down it is briefly. I don't think it is senility, because she has been blind for several years now and can still find her way around the house and land (2 acres), just very slowly.

She isn't displaying any signs of discomfort, and doesn't mind being picked up.

Any ideas?