Thank you for replying. I will try that once BD and UCC start working for me.Sure, you could just add a hunger attribute on your zombies. Check out https://opsive.com/support/documentation/ultimate-character-controller/attributes/decrease. Then you could have them go into a frenzy mode and rush your player when it bottoms out or something like that. No scripting required for the attribute, but you can access it pretty simply via the api methods at the bottom of the page.
*Edit to fix the link