All the patients recruited in this study, will have either, some dehydration or severe dehydration. Therefore, before being randomized into study, during initial 6 hours all the patients will be rehydrated either by ORS or intravenous fluid. Patients with signs of some dehydration will be rehydrated by ORS and patients with severe dehydration will be rehydrated intravenously as described below. The following IV fluids will be used: