Yes, I read that site, hence me listing that she isn't doing most of those things. However another site says that there is something called "silent calling" and she may not have any of the standard signs.
I'm just asking about the smell. Is anybody familiar with the smell? If it weren't for that, I would have never been alerted to the possibility since the vet thought she saw a spay scar. Then combine that with the fact that my otherwise uninterested male cate, is fixed to the other side of the door meowing... and I'm wondering if the scar is something else.