Randomly while thinking at work I came up with 2 new predator ideas.

1. Thin hammer spacing parasite worm that uses hammerspace to vacuum up large prey into itself.
After swallowing prey, it can't digest it's meal itself, it spent it's energy sucking and hammerspacing prey down.
so it slithers around to find a sleeping host predator and slips into their butt or mouth while they sleep.
Then they eject the prey inside them, they grow to full size or as big as the predator's insides can hold.
After host predator digests the prey the worm sucks up the digested contents back into itself and can absorb the nutrition.
Leaving the predator confused why they suddenly fat with live wiggly prey, then poof gone after digestion, no calories gained.
Normally could go unnoticed by the predator if they don't wake during the process. The worm itself can't be digested and is basically
a thin hammer spacing, living intestinal noodle of doom.

2. Basically the second idea for a bat predator, their stomach can be safe or digesting based on if they are standing upright or hanging upside down.
They could only digest prey if they hanging upside down or only if they are standing upright. Basically can be a natural digestion trigger for stomach to do it's thing when in one position or the other.
Or perhaps their stomach has 2 segments (connected through an orifice that is gravity fed, as in only allows prey to pass through when gravity forces them in) being upright or upside down sending the
prey into the digesting stomach, while the other is just for safe storage (could like prey in fatal stomach once fed in as well). This allows the predator to send prey from the safe end to the digesting end based on their natural digestion position using gravity to move the prey from one part to the other or stimulate their gut to digest being in the "proper" position.

-Based on the bat stomach position I like the idea of a bat medic that can heal if hanging upside down but digests if upright. So if they can't relax and let it hang they digest their comrade. :3