My dogs behaviour after giving birth?

First thing is to have her checked out atthe vets for a UTI...it could be that she is stressed being left with pups overnight, feels she can't cope as a new mum, just by putting in a bed at a higher level that the pups can't get to but she can may solve your problem...or if the pups are in the room in the door way put a piece of board across that she can jump out over but the pups can't....clip all the pups nails so they don't hurt her when they feed...check for teeth in the pups as this will make her sore and so put down a bowl of puppy milk to encourage them to get that as well as puppy food to wean them on...one meal being a puppy milk made meal like porridge oats