At this stage, you should be feeding her 25% - 30% more food....Split into 2 meals a day......Example: If she normally eats one cup, she now needs 1 1/4 - 1 1/3 cup, etc.
I have added a list of what to do and expect......Most dogs give birth around the 62 day mark.......Are you ready with all this? Good luck......
Week Six (Days 36-42)
DEVELOPMENT OF THE PUPPIES
+ Development of skin pigment
+ Fetuses should weigh around 6 grams and be 45 mm long
+ Fetal heartbeats can be heard with stethoscope
CHANGES IN THE *****
+ Nipples darken and enlarge
+ Abdomen continues to enlarge
CARE OF THE *****
+ Add cottage cheese or hard boiled egg to food daily
+ Increase the amount of food in the extra meal
+ ***** should start sleeping in whelping box
TO DO LIST
+ Assemble whelping box
+ By this time you should be fairly sure that the ***** is pregnant. Notify the people on your puppy list. Let them know when you expect delivery.
Week Seven (Days 43-49)
DEVELOPMENT OF THE PUPPIES
+ Growth and development continues
CHANGES IN THE *****
+ Abdomen hair will start shedding
+ The ***** will start to look pregnant at this point
CARE OF THE *****
+ Slightly increase both meals
TO DO LIST
+ Stop any roughhousing or jumping
+ Radiographs (X-rays) possible to determine number and size of puppies
Week Eight (Days 50-57)
DEVELOPMENT OF THE PUPPIES
+ Fetal movement can be detected when ***** is at rest
+ Puppies can safely be born from now on
CHANGES IN THE *****
+ Milk may be squeezed from nipples
+ The ***** will be very large.
CARE OF THE *****
+ Add moderate lunch
TO DO LIST
+ Gather whelping kit + Prepare phone list for help/support. It should include your vet's phone number, the emergency clinic's phone number, the number of any friends who will be offering support during whelping, and anyone else you might need to contact before, during, or after whelping (like your office to let them know you won't be in!)
+ Make sure your car is gassed up and ready for a possible emergency trip to the vet's office.
Week Nine (Days 58-65)
DEVELOPMENT OF THE PUPPIES
+ Growth and Development continues
CHANGES IN THE *****
+ Nesting behavior may be seen
+ ***** may become distressed (panting, pacing, acting uncomfortable)
+ Temperature should be around 100.2-100.8 degrees Farenheit
+ When temperature drops to around 98-99.4 degrees Farenheit, puppies should be born within 24 hours
+ Appetite may disappear as whelping approaches
CARE OF THE *****
+ Start taking temperature three times a day
TO DO LIST
+ Notify vet or emergency clinic when temperature drops so that they will be ready if you have any problems
+ Keep detailed records on temperature and behavior of *****
+ Double check that whelping supplies are ready
Post Partum
* Make sure each puppy gets some of the *****'s colostrum (first milk) within first 24 hours.
* Lochia (vaginal discharge) should be reddish to reddish-brown (green is okay on first day). If you see black discharge, contact your vet immediately!
* Within 5-6 hours of last puppy's birth, take ***** and puppies to vet for check up. The vet will ensure that the ***** hasn't retained any puppies or placentas and that the puppies are in good health.
I have not had this situation, but I would guess just feed her what you have been feeding her just a little more.
You will get others on here with better advice, I just wanted to make sure this one stays up on the board.