
No it shouldn't. I started it as soon as she came in season, one tablet a day then doubled the dose the day before and day of mating and then stopped it with the boy. The bitch also needs to be on this and should be carried on for the first 3 weeks of pregnancy. It's the first time I've ever tried it so fingers and everything crossed on the results.
I just hope that she doesn't have a beautiful short tailed girl as I've just kept her granddaughter who has a very, very long tail!!