Difficulties in absorbing magnesium from the gastrointestinal tract are usually associated with metabolism disorders of this mineral. However, magnesium metabolism disorders are not as common in dogs as it is in sheep and cattle. This is probably due the difference in the anatomies between these species.
Hypermagnesemia, or excess magnesium levels in the blood, is rarely seen in dogs except in those that have ingested ice melts. It may occasionally occur in dogs with kidney failure when they are given intravenous fluid supplementation as part of any treatment. Elevated magnesium levels in the blood may cause cardiac arrest.