
Sounds like the bitch is bagging up because the pups have lost their appetite due to being ill. Normally at this atage erht milek woudl hardly be noticed as the pups would strip it all, as well as their other food.
I have found that allowing the bitch free accesss to ehr pups means that she drreis up naturally. My bitches normally still give the odd suck right up to 8 to 10 weeks,a dn milk won't be completely gone until 12 weeks. Had to wait this long in order to have my Kizi spayed.
In this case I would get some hot flannels as hot as yu can st6and but not hot enough to scald. Lay these on her milkbar and it will cause the milk to flow out and the glands to soften. You should then put the pups on her to take some more of the milk off.
If you leave it too long the milk will get infected and she will become ill.