Dogs are always watching us, reading our body language. They know when we’re happy, playful, going for a walk, or even the vet.

The BBC Earth reports that Max the dog actually saved his owner Maureen from cancer thanks to his watchful behavior.

The amazing dog wasn’t acting himself. He seemed unusually depressed and aloof. Maureen thought there was something wrong with him, but really there was something wrong with her. She had a lump in her breast that even the doctors couldn’t detect.

Thankfully, because of Max’s behavior, she had herself checked and had the lump removed. Max immediately became his happy old self again.

This video telling the incredible story is actually from January, but it is trending now more than ever.