This heating pad which was plugged in!
While I was in the shower Sunday morning, out of all the toys and Nylabones on the floor that Hailey has to pick from she decided to eat my heating pad. When I found her she had both ends of the cord in front of her chewed clear through. What I didn't realize at the time was that she considered this heat pad a snack.
Sunday evening she threw up. I figured she picked up something outside. She has a fondness for bugs and dirt. Today when I was home for lunch she threw up again. At first I was puzzled as to what she had eaten. I saw tiny copper wires and what I thought was white plaster. Hailey was acting fine so I placed the evidence in a plastic bag and headed back to work. I showed it to my husband later and then it hit us. It was the heating pad! The white that I saw was plastic not plaster. This evening I noticed some more of the heating pad coming out the other end as well. Hopefully everything is out now but we are keeping a close eye on her. Hailey is one lucky wiener!