You can tell these two will grow up to be best friends. Watch how this adorable puppy tries to guard her charge, but instead becomes overcome with tiredness. From the video's description:
"Callie (the puppy) is a mutt that was tied to our fence in 2012. It is guessed that she is a pitt/catahoula mix. She is the sweetest dog we have ever had. Our son is about 3 months old in the video (the same age as Callie)..."