
It's NOT something I've seen in our pregnant bitches, the vulva licking, or leaking. And mine weren't significantly more hungry that soon after being mated either, or 'grumpy'. I'm wondering whether she has Pyometra which would (if you are 'lucky' because some pyos are closed so you don't see any discharge and miss what's going on immediately) mean a trip to the vet, for sure. Each bitch is different, even their pregnancies can be different however. Best advice - see your vet, and take a sample of her urine with you. Fresh.
ps. Even if she seems to be hungry, do not up her food at this point. Getting fat through a pregnancy isn't any more good for her, as for us! Once she has puppies on the ground, and you SEE the number she has to feed then you may need to up her food. Again the puppies will take what they need from her before birth. So don't let her get fat!!