Bruising or discoloration, Cold feet, Cold hands and Fatigue. WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms bruising or discoloration, cold feet, cold hands and fatigue including Bruise or contusion, Raynaud phenomenon, and Hematoma.
The approximate blood volume of a rat is 55-70 ml/kg of body weight. For a 300 g rat this is equivalent to 17-21 ml (5). Single sample: Without fluid replacement, the maximum blood volume which can be safely removed for a one time sample is 10% of the total blood volume or 5.5-7 ml/kg.
In mammals and birds, which are thought to be the usual prey of vampire bats, blood amounts to 6-10% of the animal's weight. This means that a 100-kilogram person (220 pounds) would have no more than 10 kilograms of blood, or a 1,000-kilogram moose would have 100 kilograms of blood.