I say "Good Boy" to Eli all the time. He often says "Goo!" back at me. This morning there was a distinct "D" at the end. To be fair, it sounded more like "Gourd" than "Good", but close enough! We were still in bed at the time. I was stoked. He seems really happy when I say "Good Boy! Good Eli" and smiles and laughs. Adorable.