There's a lot of talk about stuffing prey before eating them and that is enticing, but I like the thought of stuffing predators.
Prey are food. They are just a part of the meal. What better way to remind them of that than for them to land in a stomach already full of food. Thoroughly chewed or gulped whole like themselves, food squishes against the prey as the predator's stomach grinds and massages around them, secreting acids and enzymes to melt down its contents. The prey inside feel the sting of digestion and the gut they're in gurling louder and louder as the realization dawns on them — they are no different than the saliva-soaked food that cushioned their descent.
Even better if a pred eats prey in the middle of stuffing themself. Prey a part of the three- or five-course meal. They scarf down appetizers, swallow their prey, slurp down dessert, and drink as how many beverages they want to quench their thirst. After, prey and food still heavy in their gut, the pred is unsatisfied and starts snacking. They gut swells out as they keep stuffing themself. Maybe they swallow down more prey. They feel the prey inside less and less as their squirming is buried from all the food they've eaten, less room inside for the prey to move.
A classic example of ordering pizza, eating the delivery driver, then binging on all the pizza they ordered comes to mind. That scenario is one I never tire of. It's like the pred ordered the delivery driver to go along with their meal. With every swallow, pizza piles atop the driver, burying them in greasy bread and cheese. When they’ve eaten it all, the pred rubs their hands all over their full gut, feeling the driver inside.
Maybe the pred has an observer companion feeding them, a feedee/feeder relationship. The observer comes home with groceries to the pred gulping down some prey they found or the observer baits prey home to supplement the predator’s dinner. Either way, the observer will stuff both into the pred for their mutual enjoyment.
Eventually digestion really kicks in and dissolves the boundary between food and prey. The pred’a gut rounds out as its contents liquify. Were the pred or an observer to feel, they wouldn’t be able to tell where flesh ended and food began. Maybe they’d feel the occassional bone or harder lump of food. But for all intents and purposes, the prey and the food take the same journey through the pred’s intestines, the same nutrients sucked out of them, fueling the pred’s body.
