My chihuahua Sam

My husband and I take care of my mother who has Alzheimers Diease. Sam, our two year old chihuahua, has decided that it is his job to let me know when my mom leaves a room. Each time she leaves the living room, he will come and find me. He takes my finger in his month and pulls. He doesn’t bite. He just kind of “hooks” my finger behind his canines and pulls. When he does this I know that mom is leaving the living room. Here is a picture of Sam. It isn’t the best, but it is the only one that I had on hand. We have five chihuahuas. Sam and four females. Laura T