this year, i had the test on 24 days, and the test was negative. my vet said i need to have it done again about 32 days. previous litter, i had the witness pregnancy test ran on 24 days last time, and my girl had 8 live puppies. I am concerned that if the test is positive at 32 days, my girl will not have as many puppies. i know 24 days is early, but i got this info from synbiotics website