
i too have lost two litter from the same bitch one result was not her fault she court kennel cough and on day 56 she had her puppies bye the four week we had lost 6 of the nine puppies.the second litter she had on day 54th all five died in 24 hour that was it i was not going down that route again i had her spayed.
but hope came long with my swd bitch which she had 5 puppies in april so there is light at the tunnel.so my affix is now in a different breed than i start out with fcr 20 year ago.
then my hopes fared again in april when teyha my only fcr bitch to carry on my line in this breed die.
so some time i think you got to have time out and think what is best for you.
good luck