Denise!!! Geesh you know I had to read the entire thread to see if Miami ate the keys. Reminded me of a commercial where the guy picked up his bulldog and used him to unlock and start the car to get him to the vet, because he did eat the key. Apparently it was a commercial for keyless entry and start.
I guess you checked your coat pocket? And emptied your purse out completely. (I had a spare set of keys in my purse and when I left the primary set in the car, for the life of me I couldn't find them. It wasn't until I changed purses that I found them ... after calling a locksmith to open my car)
Did you check dog beds? Maybe Miami did take them but not eat them.