here is some info
ALKP is important in metabolism and is found in liver cells. High levels indicate bile duct obstruction, Cushing's, liver disease, certain cancers and may be due to certain drugs such as steroids or phenobarbital. Low levels indicate starvation or malnutrition.
Understanding Blood Work: The Biochemical Profile for Dogs
was the alt high?
i would do a bile acid test to test liver if your dog has not had one unless the dog got into something toxic or was on a medication prior to test and rule out liver issue first
what percentage of protein are you feeding?