
Have served my Tilda on day 1 (yes - one) of her season as far as symptoms were concerned - no discharge or anything, and I
had been watching her like a hawk , tissues at the ready for weeks! Just saw her behaviour with our neutered dog,took a cytology smear, and took it from there.
Result - 8 bonny pups.
So there's no guarantee about 11 - 13 days!
Jo