Do you mean that you gave him raw, uncooked pigs ears like you'd find in the meat section of the grocery store? If so, I wonder if they were too gristly and/or fatty for your dog's stomach and upset his digestion. How many did you feed? Sometimes a sudden big portion of something unusual will make my dogs puke too!

I can't handle feeding pigs ears at all so my dogs get raw beef marrow bones to chew on. I get the ones cut in 3-5 inch pieces and scrape some of the marrow out to cut down on the fat content. The dawgs gnaw on those for hours, and it cleans their teeth too!