What was your longest/oldest living duck you all had before it expired? What is the typical life span of a duck/goose? Just curious as to how long yours have lived and what you think you did to keep it living as long as it has before it expired? Do breed specifications render in on the factor? Like for instance, smaller size dogs live a much longer life span(15-20yrs) then a giant size dog like what I have, a Great Dane. that typically lives 8-10yrs. This curious mind wants to know!