When to take your dog to the veterinarian for vomiting Vomiting. We all know that sound, especially when it happens in the middle of the night and your dog is sleeping on your bed. There are many, many reasons a dog can develop vomiting. It’s not always a reason to go to the vet, but it is always something to monitor because it can be a symptom of many health issues. Reasons a dog vomits:
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