Dog vitamin What experts say
A congenital canine cataract is present at birth and usually occurs in both eyes. It is not always hereditary and may result from in utero exposure to infections or toxins. Early onset canine cataracts develop in young dogs as the result of trauma, diabetes mellitus, or exposure to toxins or infections and may be hereditary. Senile, or late onset, canine cataracts form in dogs who are six years of age or older. A hereditary canine cataract can develop on its own or simultaneously with another eye disease.