Hi Misskitz,
I think that if I have gotten all of this straight,
you got two female chins, you also thought they would not turn up prego. OOPS!
Next, wala...prego, okay..
I think you are saying that she now weighs 1,128g and is probably due in a couple of weeks.
You and your vet are assuming that she will lose 200g after birth, which will put her around 900g...........but we won't know her actual loss till later, so let's not worry about that now. Also 900g would be a very healthy weight for her (my smallest chins weigh around 750g, and my largest are 900-1000g).
I would put her in the 1"x1/2" openings cage now, if you are not sure when she will deliver, then please don't take any chances of those babies being born in a cage that they can get out of.
Some scales will be different from others ( i don't think 200g) but try to use only one scale to gauge her weight gain and loss on as you will be much more accurate. Do you have your own gram scale, a postal one is the best.
I would not worry about feeling for nipples especially if this is your first litter. They can be hard to find under all that fur. Nature usually takes care of itself, and it would be pretty unusual for her to not have working nipples, and her milk will probably not be in yet with two weeks to go. Make sure you let her eat her placenta as it will give her protein and hormones that will bring her milk in better.
When she truly goes into labor (which is usually in the morning hours) you will notice her stretching herself- it looks like she is lengthening herself as far as she can, and eventually when she has contractions she will generally arch her back and then stick her little face down to look and check on her own progress. Then she will rest and it will all start again, eventually and this can mean 1-2 hours of this, and she should begin to push. Mine usually stand up (some even hang on to the bars of their cage) and you can really see them making an effort to push the kits out.
You will know she is done when she passes her placenta, again it is very important that she eats it. I am not sure what color Daisy is but if she is a lighter color and you are not around when she passes the placenta you will usually see bloody stains on her front feet, and around her mouth.
If you are around when she delivers make sure she is not so busy delivering more kits that she cannot get the ones born dry and warm. If you have to help with this have a warm (not hot) towel handy, dry them off and get them back with mom as soon as possible.
Good luck and PLEASE keep us posted.. when you can.