When your dog is ready to whelp, her temperature will go down to about 100. She will start 'nesting', pulling blankets around , trying to make a nest to have her puppies in. Where is she going to be having the pups, in the house, or out? She will not be interested in food up to a couple of days before she's ready to whelp. How old is she? Have you taken her to the vet for a puppy count? It's important to know how many pupies to expect, because if there are few, the bitch can run into trouble, and need a cesaerian section. On the other hand if she has 12 you are going to have to do some rotating of the pups for nursing, and possibly also be ready to supplement their diet. If the bitch is ready to whelp you will see a slimy discharge, coming from her vagina, and it will steadily get more profuse. The dog may still be walking around but she will be panting. When she lays down to push, and the first pup is born, make sure the amniotic sac is broken and the cord is cut. If the bitch does'nt do it, you will have to do it your self. If she lays down and pushes for an hour,and there is nos sight of a pup, or there is part of a pup visible but it's not coming within a very short time, get her to the vet. If you don't you run the risk of losing all of them. The same applies if there is an extreme amount of bright red blood that does'nt stop. Make very sure that the pups have been dried, and have a warm nest. As they're born, and cleaned off by the Mom, put them together in a warm area right beside you (let her lick them if she wants to) so the Mom does'nt lay on them or stand on one, if it's her first litter. What we usually have is a large wooden box, with enough room for the Mom and pups, with plenty of room for her to stand up, and turn around, called a whelping box.Pups need to be kept nice and warm, and free of drafts. I put soft blankets in mine at one end of the box. As the Mom has each pup, she will also pass a placenta for each one. Make sure you count them, because you do not want one to stay inside the mother. She will probably try and eat the placentas, you can let her if you want to, just be ready for a good bout of diarrhea for a couple of days, if she does eat them. If this is a young dog, she may not know what the heck is going on, she may be frightened, and even ignore or be aggressive toward the pups. Watch carefully for those signs, and encourage her and pet her as she labors. Do not have any children, loud noises, or pets around when she is giving birth. That alone can make a dog aggressive toward her pups. If you have any further questions feel free to ask, and if I've left something out I hope someone will add it. Good luck.