Thanks everyone for the positive stories and support.its greatly appreciated. What a sight that must have been the boa dropping down on the desk.
I had not heard about using pennies we will try that!
That was another indicator one of the dogs or cat did not get her. We would have heard something the cat would have been growling and the dogs making a fuss.
I talked my husband into going into the crawl space and disconnecting the duct work and run the camera up there and nothing. I can at least put my mind at ease she is not in a vent or the ducts. I hated the thought of her dying in there.