I usually buy the natural cow ears from Jeffer's because my dog loves them and have never had a problem with them. But, I decided to try these smoked ears since they were new. Within 2 minutes of chewing on one of these ears, my dog gets sick and vomits. I've tried feeding them to her on a few separate occasions to see if it was an isolated incident, but the same thing happens every time. I bought 5 of them that I'll now have to throw out =( If you are considering these ears, I would suggest you think about the natural cow ears instead.