Thank you both of you, yes I wanted them to test for EC, but they tested only IgG antibodies, and it was positive (IFAT 1:1280), that means we don't know if the infection is active right now (IgM were supposed to be tested too, these antibodies are present during active infection or reinfection).
I am thinking about panacur treatment anyway until we find out anything else or do the retest or test the parasite from urine.. I am searching for a lab that can do this.
Nothing wrong in her ears visible, I was thinking about ear infection too, I know it can cause loss of balance, but from my observation, it literally looks like weakness of the legs, not balance, I don't see her falling while walking.
I was looking at some slowmotion videos I took today and her left leg is definitely worse than the right one.