Sculk sensors cannot detect:

• Animals being fed to enter breeding mode
• Animals being tamed
• Tamed animals being fed to restore their health
• Ocelots or dolphins being fed to gain trust
• Zombie villagers being fed golden apples to get cured
• Foxes when they start eating (it works correctly when they finish eating)
• Pandas finishing eating bamboo or cake
• Sheep eating grass
• Horses grazing
• Iron golems being repaired