Part of Sikhism is the teaching of Khālsā - a Saint-Warrior (truely a holy Soul & ninja both at the same time.) A Sikh who has been initiated into the Khalsa is titled a Singh (males)/Kaur (females) or Amritdhari, as opposed to Sahajdhari the non-baptized Sikhs who believe in all the tenets of Sikhism and the teaching of the Sikh Gurus and hence the Guru Granth Sahib.
The basic code of conduct (Rehat Maryada) issued by the Khalsa is :
Abstaining from consuming milk is NOT part of Khalsa and thus not part of Sikhism.
It is possible that there has been some confusion in the Western world about Sikh beliefs because the portions of the world with many Sikhs also have many Hindus. Hindus advocate the practice of ahiṃsā (non-violence) and respect for all life because divinity is believed to permeate all beings, including plants and non-human animals. In accordance with ahiṃsā, many Hindus are vegetarian to respect higher forms of life. Some vegetarians avoid all animal products, while others are lactovegetarians - meaning they avoid meats and eggs but drink milk. Note that The cow in Hindu society is traditionally identified as a caretaker and a maternal figure, and Hindu society honours the cow as a symbol of unselfish giving. Cows thus have a special status in Hindu culture, thus raising questions about whether they would drink milk. The cow does NOT have special status in Sikh culture beyond that afforded to all living things.
Anything other than Alcohol
Yes, they drink milk.
yes chocolate milk is a drink it is milk, milk is a drink so if you add chocolate it will be the same but chocolaty,
No. Cows don't need to drink milk: they drink water, not milk.
no but they can drink 2% milk. they will not drink non fat milk.
There is no reason to stand to drink milk. You can drink milk from exactly the same positions as you drink anything else.
Koalas drink their milk from their mother.
you should not DRINK MILK WHEN YOUR POO IS WATERY
No, they can only drink their mother's milk.
Yes. I have a few and they drink milk.
no because only mammals drink milk
Yes they can drink milk as it contains no gluten.