Some surgeons may perform so called reversal or reversible surgery for gastric bypass in patients who aren't satisfied with the weight-loss procedure.
If too little stomach means that you are unable to consume even liquids, you should be checked for a gastric bypass complication, known as anastomotic stricture (the new connection, anastomosis between stomach and bowels is narrowed due to scarring, leading to extremely small opening that interferes with food and liquid passage).