In 1941, H.K. Webster Company expanded by acquiring a Quaker Oats plant in Richford, Vermont. By 1954, the company was earning $15 million in annual revenue and Ralph Kingman Webster, H.K. Webster's great-grandson, joined the company. By 1988, the firm had grown to 8 plants and 17 retail stores in New England producing $150 million in annual revenue. That year, Varied Investments (which would later become Muscatine Foods and, eventually, the Kent Corporation) acquired the H.K. Webster Company and officially renamed it "Blue Seal Feeds." Blue Seal moved its headquarters to a new facility in Londonderry, New Hampshire in 1994. In 2008, the company acquired the I.L. Richer Company, another feed company based in New York. Blue Seal produces a number of branded items, including pet foods and animal feed as well as a line of lawn and garden products. Blue Seal products are primarily sold in the Northeast and along the Eastern Seaboard. Blue Seal also operates several retail stores in New England.