My 14 month old female has suddenly decided that she is afraid to go up and down our stairs AND she seems to see imaginary boundaries in our home that she will not cross. These are random and very weird occurrences. She will see "some line", and stay on the other side crying even though she wants to come be with the family on the other side. Sometimes she can be coerced across "the line" with praise or treats. Its soooo weird! Anyone seen anything like this?