Whenever the dogs sniffs that something is not right he alerts the parents and they give him treats after that. Now the dog loves to alert because that means he will be rewarded.
Especially one night his assistance was remarkable. While the boy was sleeping the dog noticed a sudden drop of his blood sugar and went on waking up the mother. Luckily she got to him on time and everything went back to normal soon after.
This picture is captured that same night and shows how loyal and alert is the dog towards the young boy. How he cares deeply for his health and goes way and beyond to make sure he stays on track.