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Hi, I can help you with your question today. Have you seen her moving around at all today, or is she lethargic?
I'm not sure if you intended to request the phone call? If not, we can continue through the regular chat here.
Based on the open mouthed breathing and extended head/neck, it sounds like she is in respiratory distress. I highly recommend having her evaluated by a local emergency hospital right away. I would start with a physical exam and x-rays of her chest to evaluate her heart and lungs. It is possible that she has cancer in her lungs, fluid in her chest, etc which is increasing her respiratory effort.
Please let me know if you have further questions. I am happy to continue until I provide the service that you seek. Here is my website if you need to reach me again: http://www.justanswer.com/veterinary/expert-drsusanfriend/