Amylase is a specialised enzyme most herbivores and omnivores produce in their saliva. It helps (catalyses) the break down of starchy carbohydrates into simple sugars before they enter the stomach. Although dogs do produce amylase, the enzyme is added further down the digestive tract in the pancreas and small intestine.
It’s normal to have some amylase in the blood. But too much of it could mean one of the ducts (tubes) in your pancreas is blocked or injured.