OKAY SERIOUSLY THO
This scene...
I'm not inserting every single image, as there's a 10 image limit, but... yeah. Shadow Milk Cookie DID CONSIDER Pure Vanilla Cookie's words. But then...
He thinks SOMETHING. He then lashes out at Pure Vanilla Cookie and says he knows nothing. And I feel the need to say that in the English dub, it sounded like he was almost crying.
But if we go back in the story, things get clearer. Look at this scene.
He realizes that Pure Vanilla Cookie tricked him, and when he can't get back his soul jam, he is left calling Pure Vanilla Cookie a "traitor" and a "liar". How hypocritical, especially for the being of deceit.
But... Here's where it gets crazy.
See that reflection in the top right corner???
It resembles Silent Salt Cookie.
Silent Salt Cookie may have had something to do with Shadow Milk Cookie's imprisonment.
Shadow Milk Cookie was betrayed by HIS FRIEND.
WHICH WAS WHY HE REACTED THAT WAY WHEN PURE VANILLA COOKIE OFFERED TO BE HIS FRIEND. WHICH WAS WHY HE REACTED THAT WAY WHEN PURE VANILLA TRICKED HIM.
Pure Vanilla Cookie was right about Shadow Milk Cookie. He is lonely. And Shadow Milk Cookie DOES want to be Pure Vanilla Cookie's friend (see the Sheep's Clothing Cake Hound Description).
But I think there was one thing Pure Vanilla Cookie got wrong.
I think Shadow Milk Cookie noticed.