When the big guy passes a tree, he comes face to face, once again, with his pursuer. Hanging from the tree is a red box with no front. Sam is standing there with a fox, and of course, the platter.
This time, he asks the big guy if he might appreciate the dish "in a box" (39) or "with a fox" (40). He's really doing everything he can here to get the big guy to snack.
As you might have guessed, the big guy declines this offer as well and makes his way up and down a big red hill.