The lab process blood for haematology which gives information about problems such as infection and anaemia.
Biochemistry, which assesses the patient's internal organ function, particularly the liver and kidneys.
Serum amyloid A (SAA) and fibrinogen are routinely examined to indicate how severe or longstanding a condition may be.
Hormone analysis can be performed on blood samples, for example progesterone levels are assessed to see where mares are in their reproductive cycles.
Electrolyte levels can be used to monitor patients in the hospital, particularly horses recovering from colic surgery. Urinalysis, looking for problems with the kidneys is available.
Samples such as tracheal washes and bronchoalveolar lavages can be analysed, allowing investigation of airway function.