My female is entered in a HT next weekend but I've noticed my male dog is starting to show interest in her, i.e. sampling her urine, lots of sniffing around her etc. etc. Looks like the heat cycle is coming soon. Never had to scratch my dog for a heat cycle yet (always had males before this dog) at what point is she "too interesting" to the male dogs and should be scratched? Do I wait till she is starting to swell up? Appreciate some advice from other owners of females as to when I should scratch her from the test. It wouldn't be such a big deal but if we miss this test due to her cycle we miss the last of the regional tests for this season, meaning if I want to get her SH title I will have to make some loooong drives and burn vacation time traveling to do it in the fall. On the other hand I don't want to enter a dog that is too close to her heat cycle. Suggestions?