This is a discussion topic for the Ore project, Lakotnik - Hunger Preview. View the full project on Ore for downloads and more information.
Lakotnik - Hunger Preview
A hunger preview plugin for Minecraft.
Every player with permission lakotnik.hunger_preview can see how much nutrition will
the selected food provide (granted by default).
Supported loaders
Config
#Lakotnik Config
# Update rate in ticks.
tick_update_rate=10
# Whether to enable on low hunger (<= 6.0)
# Causes minor problems as client will think it can
# sprint. If you don't care about that, feel free to enable.
enable_on_low_hunger=false
Why can enable_on_low_hunger be problematic?
Sprinting is managed on client - if you hold a food item in your hand
and not have enough hunger points to sprint, you will still be able to sprint
in intervals when your hunger bar is in preview mode.