A complete blood count reflects red cells, white cells and platelets, used to judge anaemia, infection and inflammatory tendency.

A biochemistry panel covers liver enzymes, kidney markers, glucose and electrolytes, reflecting organ function and metabolism, though sensitivity to early disease is limited.

The two cross-check each other: raised white cells with abnormal liver enzymes, for example, point to further imaging or specific tests.

Results must be read with age, hydration, fasting state and symptoms. A single abnormal value is not a diagnosis; a vet interprets it.