I have recently bred my bitch, she is a Pomeranian so it was difficult to tell when she was pregnant until late (7-8weeks) but i did notice she did drink alot more especially just before she pushed the puppies down into her stomach (which i saw happening and this normally happens at night so i was lucky) enlarged nipples is a sign, i never noticed any discharge from Foxy. I never had Foxy scanned as i do think it is a waste of money its more worth while if you wait until the day the pups are due and she does have them (as it it only a couple of weeks later from when you would have the scan) Foxy did eat less at the beginning of her pregnancy but then near the end started eating alot more and she did become very relaxed and just wanted to lay about and not do much.

Your dogs 9 weeks of pregnany will go quickly and you want to make sure you are prepared because even if she isnt pregnant this time you will be ready for next time as you want to breed her. You want to make sure you have a whelping box (or any cardboard box suitable) and a whelping kit, you also want to make sure that you read up on the birth and caring for new born puppies, you need to know what to do if one of the puppies is coming out backwards, sidewards, cord tied around the neck, not breathing etc.. its alot to take in so i would say concentrate on this more than if she is already pregnant as you cant do anymore to control that but you can control the way you look after them.

Good Luck and puppies are so much fun when there born, hours of fun.