Hi Elizabeth,
They can sense in a way if a person is not feeling wll just by the actions of the person, however it usually won't cause them not to have anything to do with a person if they are still treated the same as before. If something happened the last time you were around where she got hurt, like she slipped on the floor when you were nearby then she may be associating that pain with you. Another reason is she may not feel well either.
dog training consultant
24 years training & behavior,pet first aide, Therapy dog eval., PA Animal Response Team