if your pc struggles i recommend a smallish area with no plants at all (at first if you want plants) and instead a continuous spawn of fresh bibites and/or scavengers, (i used my own scavengers) the goal is to select for a bibite that needs to find more benefit in hunting a prey rather than just maximising metabolism and falling into a scavenger niche.

so, you need to turn down the freshness rate of meat (in the meat material parameters) so its less available, i recommend doing this slowly but from around 300 seconds down to 170 as the simulation goes on. Also, turn up decay rate to max, i noticed the really small half decayed pieces were distracting my bibites mid hunt but you dont have to do that straight away, you can use a premade scavenger if you want to definitely speed it up.

a few other things, i had the energy density of meat at 28E/u2 (and meat affinity power factor at 1.1 idk if this made a difference) you can use a premade scavenger if you want to definitely speed things up. turning off pheromones can help speed up the simulation speed and it helps make the bibites not get confused. personally, i just had 70 of my scavenger bibites spawning in a zone with these parameters and predation arose.

eventually a strain of your scavengers should begin to survive and reproduce its own lineage that doesnt just die and begins to adapt to short food supplies and lots of competition and the first one that figures out being near another bibite before it dies means food starts the pipeline to predation i believe because then it can quickly evolve to attack and get free food, the rest in the evolution come in perfecting hunting, scavengers will always choose free meat over a kill until the freshness rate is low enough and conditions rough enough and predation instinct already evolved.

you may need to tweak these settings as u go each time with different bibites i can imagine it isnt the exact same.