Purebred Breeders reviews this question: Eating a significant amount of snow cause your dog to vomit so why do they do it? Dogs may actually do this to purpose induce vomiting, if their stomach is upset or if they are suffering from gastritis they purposefully do this to make themselves feel better. The above is the most common reason for why they eat snow but there are other possible explanations to this behavior. Thyroid problems
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