reckling
/ˈrɛklɪŋ/Chiefly English regional (northern ) in later use
noun
A small or weak animal or (occasionally) plant; the smallest and weakest animal of a litter, the runt; (in extended use) the youngest or smallest child in a family.
Origin
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. Origin unknown; with the ending compare -ling.