Was it in a blood count result?? If so, it's aspartate aminotransferase - which is an enzyme occurs in almost all cells within the body but is used to primarily diagnose liver and muscle disease. Circulating concentrations of this enzyme will peak approximately 24 hours after an inciting incident (hard exercise/muscle injury) and return to normal within 7-10 days.
yes in blood results. it was a little high but all the rest of the test was normal was checking the liver. the vet said coz the horse was very stressed this could of caused the slight raise have you ever heard this?