How to respond to a co-workers email sent in all caps?

Since by law I can not go into specific details I hope someone can understand my question & help me be professional. I (business office manager) sent the nurse case manager an email on a Friday morning asking her to contact a hospice agency and request authorization to provide needed therapy to one of our residents (nursing home). Monday afternoon the director of therapy came to my office stating he asked the case manager for the status of the authorization and her response was "I don't know what you are talking about". I looked through my "sent" emails to double check that my original email was sent and of coarse it was. I forwarded the original email to her adding that this was a follow up email and requesting a status update. The case manager decided to quickly respond in all caps. She basically told me what the director of therapy told her since he decided to take it upon himself to contact the hospice company because he was tired of waiting for her to make the call. This is not technically his job to do, it is hers, but it was not wrong for him to do this. So, my question is how can I respond to her email in a professional manner and get my point across that 1. all caps were not necessary and were offensive 2. I do not appreciate her disregard to my request for the authorization? Thank you for any replies.