I have noticed that giving mealworms (super treat) is giving stress. Just because they are all very eager to eat as much as possible. They don’t need it if you provide healthy feed.I put out several handfuls of scratch/black fly larvae each morning as a treat and she runs to a pile,
I give them a few mealworms during moult and winter, a few times a week. I scatter them to give them all an equal chance or give them by hand on turn.