Here's why it's different for deer:
* Deer have a seasonal estrous cycle: They are only sexually receptive during a specific time of year, typically in the fall (known as the "rut").
* No distinct "heat" phase: Instead of a clear period of heat, deer exhibit subtle changes in behavior and physical signs that signal their readiness to mate. These include:
* Increased vocalization and activity
* A swollen vulva
* A clear, mucus-like discharge
* Increased urination
* Willingness to stand for a male
Important to Note: The exact timing of the rut varies depending on the species of deer and geographic location.
So, while we don't say a doe goes into "heat," she does have a specific breeding season when she is receptive to mating.