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In Reply.—We were pleased that Dr Donlan has had clinical experience supporting the evidence from our experiment that increased dietary fiber helps children with recurrent abdominal pain. With regard to his first question of how the practicing pediatrician can find out about high-fiber cookies, I can happily answer that these cookies are available in the United States under the trade name Fiber-med (Purdue Frederick Co, Norwalk, Conn). Each cookie contains 5 g of corn fiber and, as we found in our study, two cookies a day had a significant beneficial effect. The second question of how much of each different foodstuff the child would be required to eat to relieve the symptoms is much more difficult to answer. A perusal of the contents of the different breakfast cereals purporting to contain bran will show a wide range of contents for the usual serving, anywhere from 2 to 8 or