Thank you for all the feedback, it's very helpful.
I'm currently testing more powerful healing skills. Due to personal preferences, I'm struggling to balance making the predator's body too comfortable for the player. (The prey should be at the mercy of the predator.)
Increasing item usage is a good idea. I'll think of a way to make it feel natural to bring items into the body.
Digestive suppression was removed during the balancing stage. Since the predator recovers health by digesting the player, suppressing it too much resulted in a sudden game over trap. It felt unfair, so I removed it, but I'll look for a better way.
By the way, burping and constriction decrease slightly as trust level increases.
Thank you for enjoying the game!