chemistry blood panel? HGE can be easily eliminated as it is characterized by a high hematocrit reading due to the decreased volume of blood. Immediate rehydration via IV is needed if a high hematocrit reading is detected.

Based on the prior lethargy you should also be paying attention to platlet levels, hematocrit, WBCs, calcium, and lactic acid levels. If any of these are askew then an ultrasound is in order.