When their blood volume is lower they will still have an injected MM (due to the inappropriate vasodilation) but their CRT will become slower. In this dog you can see that he has an injected MM colour with a cyanotic tinge but that his CRT is abnormally normal. That is, if he had an adequate intravascular volume he would have a faster CRT but instead he has a “normal” CRT. In worse cases the CRT will be prolonged.One last word: if you can see the CV abnormalities I have shown you in the last three slides then sepsis/SIRS are high on your list. BUT some dogs with sepsis/SIRS do not have membranes as injected as this. Some hypodynamic dogs may look the same as plain old hypovolaemia. Sepsis/SIRS is on your differential list for any dog with hypovolaemia until proven otherwise.