I just bought a nice bottle of Chardonnay.
Allergy advice: Sulphites, ok. Egg and milk!! Wtf. Why should there be eggs and milk in it??

A tiny amount of egg or milk is used to clarify the wine. It makes the wine acceptable to vegetarians so it's used instead of isinglass which is made from fish swim bladders.

I would have thought wine is vegetarian anyway.

[quote=chopsim;82212330]I would have thought wine is vegetarian anyway.[/QUOTE

Not with fish guts in it it's not.

[quote=jazzyjazzy;82213599]
I meant that I didn't know there were extra things in it. I thought it was just fermented grape juice.

You would think so, wouldn't you. In reality there is a list of 54 additives to improve wines that are allowed according to EU regulations.
There's stuff to lower acidity, stuff to make wine sweeter, stuff help fermentation, stuff to stabilize the wine, stuff to give it more body, stuff to give it that authentic "ripened in oak barrels" flavour, etc, etc.
Just go to a home beer brewing/wine making shop and you can see what is available. Almost all wines, even the expensive ones, are tinkered with to improve them.
Unless the additives can cause problems for people with allergies, there's no need to declare them on the label. So only allergens are declared.

Not all additives are chemicals, there's for instance wood chips and plain water, but a lot of them wouldn't go amiss in a chemistry lab.

Why do wineries do this? For financial reasons. Most wineries can't afford a bad wine year. Costumers expect and demand constant quality.

It's not a very romantic picture and one that you will never see on the labels, but that's the way that it is nowadays.

I loved Chardonnay at first but might now prefer Pinot Grigio.

Definitely.
Preferably without milk, eggs and fish guts - that's chowder!