What's really in an egg?

Quite apart from the colouring additives that most egg farms use in the feed they give to their hens, now farms are being urged to add a fly control agent, cyromazine to the feed. It is recommended to use it every day for four to six weeks, then break for a similar period before starting the cycle again.

There is a three day withholding period for meat birds, so they should not be fed the additive for three days prior to slaughter (which is usually when they are around six weeks old). But there is no withholding period for eggs!

Interestingly, manure from hens which have fed this insecticide, should not be spread on land used for growing vegetables at rates greater than four tonnes per hectare.

Hmmmm.