Similar to a mod Horses Needs that was made by bolmin70.
For the horse to drink leave it in a water source or near a trough. If the water is too deep the horse will not drink.
To make it eat leave it near a haystack. Outside of towns the horse will also graze on grass. By default eating hay will restore hunger core much faster than eating grass. Running and sprinting will make the cores drop much faster.
When one of the cores reaches zero health and stamina will start dropping, speed will be limited and the horse will start falling to the ground. Details can be adjusted in the ThirstyHorse.ini file.
For installation put ThirstyHorse folder and ThirstyHorse.asi inside main rdr2 folder.
Credits:
alfabravozapa