
Hi peppapug
I'm by no means the most experienced on the forum re breeding issues but as nobody has yet replied here's my advice from experience in going through this twice so far :)
They do go off their food as their waistline expands - the pups are pressing on their insides and so the bitches feel the need to eat smaller portions and emplty their bladders more often, just like with human pregnancies.
Re giving milk and 'daily wormer' - I've never heard of 'daily wormer'

do you mean one dose of a wormer given for, say, 3 consecutive days? I don't worm in whelp bitches personally on the advice of my breeder and mentor friends but I know many folks do. IMO a daily wormer and the addition of dairy products (milk & cheese) could well be the cause of her loose stools.
I'd not fast her as such - maybe max of 12 hours to allow her system to settle. Skip dairy products entirely.
My girl was onto puppy food at this stage for the higher Kcals etc needed so that she kept condition as the latter stages of pregnancy takes a lot out of them. My girl was faddy too and had numerous tiny meals each day rather than two or three larger ones.
Perhaps try the puppy version of your usual dry complete and add a little warmed water to it to increase the aroma and hopefully her appetite. You could also add something like Nature Diet Puppy - a moist complete food - this helped my girl when she felt nauseus and kept her eating, albeit with persuasion.
Obvious signs of them feeling sick apart from disinterest in what's put down are frequently licking their lips or 'air licking' a lot. I gave small charcoal biscuits at these times to settle her tummy and found this helped to prevent bouts of nausea.
If concerned about her condition at all see your vet in case she is dehydrated or has another problem which is not obvious to you on appearance alone.
HTH, regards Teri