So here we are talking about EUVOLAEMIC anaemia. Their blood volume is still normal but they are anaemic such as occurs with a chronic lack of production. The heart rate is often either normal or only mildly increased because they can still deliver enough oxygen to the tissues (as evidenced by their normal lactates and the fact that their mentation is often OK as well). Blood viscosity is reduced due to the lower PCV. Their pulses are often taller than normal: just what you’d expect from the heart pumping lower viscosity blood through them. Their MMs are pale but they still have a CRT that is often fast. You have to look closely but it is there. So let’s compare this dog to one with hypovolaemia. The pallor of the MMS is at odds with the rest of the exam isn’t it? If it’s membranes were pale from hypovolaemia then their heart rate would be faster, their CRT longer and their pulses worse. It’s all in the cross referencing!