Prepare cake mixes and bake according to directions (any size pans). Prepare pudding mix and chill until ready to assemble. Crumble white sandwich cookies in small batches in blender, they tend to stick, so scrape often. Set aside all but about 1/4 cup. To the 1/4 cup cookie crumbs, add a few drops green food coloring and mix using a fork or shake in a jar.
When cakes are cooled to room temperature, crumble into a large bowl. Toss with half the remaining white cookie crumbs and the chilled pudding. You probably won’t need all of the pudding, mix with the cake until just moist; you do not want it soggy. Put mixture into clean litter box.
Put unwrapped Tootsie rolls in a microwave safe dish and heat until soft and pliable. Shape ends so they are no longer blunt, curving slightly. Repeat with more Tootsie rolls and bury in mixture. Sprinkle the other half of cookie crumbs over top. Scatter the green cookie crumbs lightly over the top. Heat remaining Tootsie Rolls, three at a time in the microwave until almost melted. Scrape them on top of the cake and sprinkle with cookie crumbs. Place the box on a newspaper and sprinkle a few of the cookie crumbs around. Serve with a new pooper scooper.
