Don't read this if squeemish but it does have a happy ending!
We once had a ewe that behaved exactly like that and, being amateurs, we invited a local sheep farmer around to see if he thought she was pregnant. He took a look and said she definitely wasn't in lamb, possibly because she also hadn't bagged up. The following day she was again behaving as though she had gone into labour and allowed me to go and examine her without taking fright. She lay on her side and was hitting her side with a front leg. I still wonder if she had been trying to tell me something. I then examined her rear end and tentatively did a little exploring with fingers and found a foot. What followed was the most strange experience of my life as I was able to find two legs and slowly eased them out. To my horror they came out with only the front half of a dead and partially decayed feotus. I couldn't believe what was happening! I had to return and remove the rest of the carcass. Not a nice job but the ewe just lay there and let me get on with it. We were breeding Portlands so it was a very small ewe. Fearing the trauma and possible infection would kill her we watched carefully over the next few days. She made a very quick and full recovery and lived on to have several lambs. That's the wonder of nature for a ewe to go through that and completely recovery without medical intervention.
