
Is your whelp box covered? she may not feel its safe. they like it quite dark and cosy in the early days. If she is acting a little strange digging and looking around as if she has lost something try giving her some ice cream or really cold milk that has been in the freezer for 5 mins or so calcium levels can make Mums act peculiar they dont always need medication for this just a top up from you can do the trick ( it happens with Mum to my litter each time but a little cold milk works wonders)
Have you tried lying in the box with her to let her know what you want her to do ie:keep putting puppies on the teat talk to her and stroke her , it doesnt always come naturally some Mums are not good at looking after a litter I am afraid and you have to be firm. Once she feels better in herself, as it is a big strain on mum , she will hopefully gain a little more confidence.
I stay with my Mum and puppies all of the time and I feed her in the whelp box by hand for the first week or so then I give her her bowl but still in the pen as she only really leaves puppies when I do.
Everyone understands thier own bitch best so do what you think she needs at this time .
If you are really concerned and the puppies are not gaining weight you may need to have her seen by the vet or top up with a bottle.
Roni