Check out worming in search box for all the info you need...

Yes Keith,from day 40 right through to pups being 7days old...

Personally myself I use panacur 10% but I do know of other people who use parazole...The dosage rate for both is similiar 1ml per 10lb bodyweight...

This is taken from the manufacturers recommendations -

Pregnant dogs:
1ml per 4kg bodyweight daily from day 40 of pregnancy continuously to 2 days post-whelping (approximately 25 days).

(= 25mg fenbendazole/kg bodyweight daily).

Practical dosage recommendations:

4kg 1ml daily for approx. 25 days

8kg 2ml daily for approx. 25 days

12kg 3 ml daily for approx. 25 days

20kg 5ml daily for approx. 25 days

40kg 10ml daily for approx. 25 days

For dogs weighing over 40kg, an extra 1ml is required for each additional 4kg bodyweight.

As treatment of pregnant dogs is 98% effective, puppies from these dogs should themselves be treated with a three day course at 2 and 5 weeks of age.

EXTERNAL LINK

I always done them Day 40 through too 3 days after giving Birth with Panacur 10%

I would never worm a bitch in pup until she is at least 6weeks,
the embryo's are not properly formed until 3weeks old.
pregnancy is divided into three stages, the first trimester (mating to day 21), second trimester (day 21-42) and third trimester (day 42 to full term). Gestation lasts an average 63 days (60-67) so it is important to note the service date so that due whelping date can be calculated.

The bitch should be de-wormed at breeding time and during the second trimester to reduce environmental contamination. Products include Drontal plus (praziquantel, febantel and pyrantel) and Panacur (fenbendazole). Before the mating the bitch should receive a booster vaccination against parvovirus, distemper, adenovirus, coronavirus, and leptospirosis to ensure that an adequate immunity is developed and concentrated in the colostrum to be passed to the pups for protection during the first few months of life.