If your dog has a sensitive stomach, I DO NOT recommend this product. My dog is about 15 but in good health. I started out just giving 1/2 of the chew about 2x/week. He really liked them! Because he was doing OK on that schedule and the package recommends "1 daily", 5 days ago I gave him 1/2 two days in a row. Initially, he seemed OK but did not poop the next day. Withheld food for approx 16 hrs, then gave him only cooked chicken and rice. He seemed OK and I resumed feeding his regular food the next morning. Within an hour or so, he vomited it up. Since then, he has been vomiting, only pooped once and it was diarrhea. Keeps going out and trying to poop but can't. Vomiting yellow bile. A mess! Nothing changed in his diet or in our life so I'm believing it is perhaps some of the probiotic ingredients in the chews? This does not mean to say your dog would experience the same outcome. I''m writing this to advise: just use caution!