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It is bacteria that causes it to go sour.

The bacteria uses up the milk, then they produce acids that cause the milk to spoil.

Spoiled milk includes a foul smell and lumpy chunks. If milk is spoiled for too long, the milk may even turn green.

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15y ago

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Can a dogs milk sour?

Any milk can go sour.


How long does it take for a container of milk to sour?

It takes about anywhere from 5 - 6 weeks for milk to go sour


Why does milk go sour?

The souring and curdling of milk is caused by bacteria.


Why does pasteurisation make milk much longer?

Pasteurisation kills any microorganisms (e.g. bacteria, fungi) that might be in the milk that could cause it to go sour or spoil.


What is the quickest milk to go sour?

Soya :) x


What would cause milk to curdle in a cup of tea?

its off ! Or it is about to go off (sour) and the heat of the tea has set the process "over the edge".


What does milk turn into if its gone off?

It will curdle and go sour


Which acid is produced when milk go sour?

Tartic acid is present in sour milk. Generally the source of tartic acid is lemon, therefore sour milk gives taste of lime. Therefore it is clear that tartic acid is there. Sometimes when we want to make Paneer from milk, we put 1 or 2 miligram tartic acid to make milk separate from water.


If you scare a cow will its milk go sour?

I don't think so.


How do you make milk lumpy?

Leave it to get sour, it will then go solid - like cheese!


How long before milk goes sour?

On the milk bottle there should be an experation date. Some time after the experation date it shold go sour. But dont wait too long!!


How does bacteria make milk go sour?

Bacteria in the milk consume the lactose sugar and produce lactic acid as a byproduct. The increase in acidity caused by the lactic acid lowers the pH of the milk, leading to the sour taste and curdling of the milk proteins.