I haven't seen such an increase in one day BUT -- I routinely give mine excess goat milk, yogurt, cheese....they love it and the calcium is good for the shells. Milk time is a favorite for them. You want to see something funny, put out some cottage cheese or yogurt and look at the messy faces as they dive in!
Mine get old cheese, sour milk etc if there's any available and LOVE it.I make a lot of my own yoghourt, so there's no expiration date........if it tastes off, it's off....then it's chicken food. Am I worried that they are eating perished food? No....they choose to eat maggoty frogs, dead things generally....so sour milk....NO issue.