I know its an odd question but members of our own species have the "blessing" each month and require additional protection shall we say.

Do other mammals bleed when they are in cycle? I would guess that even if they did bleed that would NOT mean that they were at their most receptive stage.
My wife gets angry but I contend a woman goes into heat just like a dog or a deer. They seem to be a bit more randy when the time is right...