After Joey was supposed to go to sleep last night, I found him sitting below the banister where Bosco used to sit, wrapped up in his angry birds blanket. I asked him what he was doing and he came downstairs with tears in his eyes, and said "I liked him and I miss him. But it's a part of life when you're old." I guess he heard the vet say that Bosco was like a 75 year old human and not strong enough to fight anymore.
So much emotion from a child, who for a long time seemed to have none. I'm so proud of him for being able to share that with us.