
That is your answer then.
I put about a pint of water with each 200g of dry food and leave to soak for an hour or two. Basically as soon as she has eaten one portion I soak the next.
Mien are on four times their normal ration at this stage (with an average litter of 6 - 7)and stay that way until pups are about 5 weeks, then drop to 3 times when weaning almost complete.
I then check the bitches condition and if she is lean she will stay on double rations until she has a nice bit of body. She will then have the post partum moult starting from about 6 to 8 weeks after whelping and can loose condition so will stay on increased rations until the coat has come back (unless getting actually fat).