Do keep an eye on your dog for the next few days. We had a Dane that demolished the rubber strip on the garage door. Thought nothing of it, except for cleaning up the mess, but didn't realize that he must have swallowed a few pieces of the rubber. These got into his intestines, jammed up. By the time we located the problem he had to have surgery to remove part of his intestines and unfortunately died from heart failure after surgery. If your dog starts throwing up, especially if it is bile, get him to a vet immediately and tell the vet about the cord. My Dane died many years ago and I still mourn him.