Naughty little ones... Not that you can blame them. After all, they're just doing what they were designed and born to do. As with all things.

You scoop up the leaf-litter-eater and take it away. In the heart of your garden, your Cradle, a life machine, stands ready and silent. You place the creature inside, closing your eyes, the machine feeling inside of you for what you wish. You imagine, and it becomes so, tissues and life-force knitting themselves into a new pattern. Fundamentally changed at the core of its being, the little lesser drone will become more useful now. As an Aristocrat, you are the only kind among your society who can interface with the life machines, the only one who can change the forms fundamental. You make sure the new creature's biology is genetically prioritized, so they will breed true, and soon enough your mutation will spread throughout all of the little-leaf-litter eaters!

You place it back outside and see the results of your work. It's altered anatomy keeps its head low to the ground, unable to look up for predators or to eat from your hedges, with the excess tissue being made into great big ears to funnel the scent of fallen leaves into its mouth-nostril; happily it gobbles them up, running here and there, while leaving your hedges untouched.

"Perfect! Lovely, lovely!"

Now, with your garden in order again, you can return to the masterwork, enough even to impress your Liege-Lord, Ully'Andule...