Why are my dogs throwing up with bloody stools after eating IAMS?
Vomiting and bloody stool could be caused by toxin ingestion, parasites, change in diet, toxin ingestion, infectious viral diseases, blockage in the gastrointestinal tract caused by ingestion of a foreign body, or a mass/growth in the gastrointestinal tract. Please have your dogs seen by a veterinarian right away, as bloody diarrhea can be a sign of a more serious issue, can lead to dehydration and anemia, and can be very dangerous if left untreated. I recommend taking in fecal samples from your dogs and explaining the feeding differences to your vet as well, as that may aid them in making a diagnosis. Good luck!
Updated on September 23rd, 2025