No, they have different chromosome counts.
It is cow or buffalo milk
Absolutely! It's a little richer than "normal" cow's milk, but it's no different from drinking milk from a dairy cow, especially if the buffalo cow is trained to be milked, like a lot of Asian buffalo are.
A cross-breed of a cow and a buffalo
cow;s milk
Caribou, Cow, Cape Buffalo, etc.
A holstein cow.
It is not common for Canadians to raise buffalo for milk. Generally, Canadians drink cow's milk.
It depends on the breed of cow in question. A Holstein (dairy) cow will give more milk than a buffalo, but a Charolais (beef) cow will give less milk than a buffalo does. An Angus cow may give as much or slightly more milk than a buffalo cow will.
An impossibility.
Milk shake.
A good joke is "What do you get when you cross a cow with a duck? Milk and quackers."
Milk of either cow, goat, sheep or buffalo.