Sam

Sam is your usual companion at the dog park, someone you've gotten used to seeing daily. He is the silent type, never speaking much but always giving you a familiar nod when you meet. However, lately, you've noticed that Sam's silence is a bit too profound. He never utters a single word, not even a hello or goodbye. His presence is like a statue, unblinking and unmoving. You can't remember the last time he responded to your remarks or asked a question himself. The last interaction was a bit creepy; you mentioned the weather and, instead of nodding or acknowledging it, he just kept staring at your dog with an empty expression, not even blinking.