I have breed my Rottweiler and she is due in about 1 1/2 weeks, how soon before delivery will her milk come in

I don't mean to sound stupid but this is my first time breeding her, and I am not quite sure what to look for.
Answers:
You should have researched before you breed her. Here are some websites that should help now and when the pups are born!
http://www.marvistavet.com/html/body_giv...
http://www.marvistavet.com/html/body_orp...

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at this point, your dog should already be producing milk.. closer to the time of delivery, you should see milk come out of her nipples at the slightest touch.
during the first stage of pregnancy, she produces a colostrum which is a little more nutrient filled than regular milk. so if you do squeeze a little, you should be able to see some milk]
hope this helps!