Thank you for taking the time to share your feedback with us.. We are sorry to hear about the issue your dog experienced after introducing the Member’s Mark Grain Free High Protein Chicken + Vegetable Recipe Dry Dog Food and apologize for any inconvenience this may have caused. We understand that every dog is unique, and their dietary preferences and sensitivities can vary. It’s not uncommon for dogs to have difficulty adjusting to a new food, even if they have previously handled transitions without any issues. We appreciate your observation and concern regarding your dog’s well-being. We recognize the importance of prioritizing your dog’s health and well-being. To ensure the safety and satisfaction of our members and their pets, we continually review and evaluate our product formulations. Your feedback will be shared with our product development team for further consideration and improvement. If you have any further questions or concerns, please don’t hesitate to contact our Member Support team at (888) 301-0332.