Since many players are rude/disrespectful that they steal food from feeding chest, why not a Feeding Safe?
Almost all of the servers (with farming) has feeding chest with nothing in it, because they steal the items in it
for the texture, maybe just put a apple bucket in front of safe (just like the feeding chest)
EDIT: The problem however is that feeding chest might become useless for pros/expert players
So, maybe add a setting (on feeding chest only), which can help you prevent players from stealing the items on the feeding chest
Or maybe make a Ownership Feeder’s Chest like the ownership sign