The circus returns
Olga had heard from a friend that a circus was arriving in town, similar to the traveling circus they sold Ishil to. At this circus, she heard that there were many animals and that they even had a blind cheetah who had lost sight after a tragic illness. This was enough information for Olga to go and investigate.
We don’t really know what a circus would want with a blind animal, perhaps just having a cheetah was interesting enough for people and bringing crows along. Apart from that this was a chance for Olga to see if perhaps her beloved cheetah was there. That would be a wild coincidence if he was.