Because these stores usually have a garden section, and bird feeders and bird seed are usually stocked in a garden section of a store. Presumably, the people wh

Because these stores usually have a garden section, and bird feeders and bird seed are usually stocked in a garden section of a store. Presumably, the people who solve the optimization problem "given the amount of space available and the buying habits of our customers, how do we optimize our sales volume" have concluded that bird seed is one of the thousands of items they should stock.