Asta and Ally had bully sticks from Costco Saturday night, brand new bag, with "made in USA" on it in big letters. They've had bully sticks before with no problems. They are not real power chewers, especially Ally, she just kinda gnaws on stuff. Sunday AM, Ally threw up some water about 45 minutes after breakfast. I thought that was odd since there was no food in it. She seemed OK though. We were with the girls literally all day and nothing else occurred. Then Sunday evening Asta had diarrhea. Ally still seemed OK and they had wolfed down dinner as usual. Well,overnight, Ally became really ill. I found 5 - 6 pools of vomit, mostly water, and two diarrhea pools. Asta ran out on the lawn and had more diarrhea, but no vomiting. As soon as I could I called the vet and went in, after racking my brain what could have set them off. Then it dawned on me about the bully sticks. When I got to the vet hospital, I told the vet tech and she said "OMG my dogs got REALLY sick from those bully sticks too!" She said she thought they smelled differently from the individual ones she had bought in the past. So, after subq fluids, cerenia and lab work, Ally is resting. Her BUN was 39 but creatinine normal, so just dehydrated, and no wonder. I feel horrible for giving them those d**n sticks!!!