The use of organochlorine pesticides such as DDT, aldrin, dieldrin, heptachlor, lindane, etc., has been banned for approximately 30 years. Therefore, they should not present a risk of actionable residues in milk or meat products.
If you had $15,000 to $30,000 in cash sitting in a grain bin, would you check it often? You know you would. So why not check your grain that is worth that much?