In order for cheese to be kosher, does the rennin/rennet used t make cheese have to come from a ...?

Question

cow that was slaughtered by shechitah (i.e., kosher method)? Are there any varying opinions on this issue?

Answer 1

Any product that involves the death of the animal must come from a kosher animal that has been slaughtered according to Halacha.

I'm not quite sure what rennet is exactly, but wouldn't that be against the law of mixing meat and dairy?

Answer 2

You can make cheese without rennet

Answer 3

Rennet derived from animals must come from kosher-slaughtered animals.

But nowadays, most rennet used in kosher cheeses is artificial.

Answer 4

I have never bought Kosher cheese containing any animal rennets.

Answer 5

Huh? If it has animal rennets, it's not kosher, is it?