But to see if a doe is ready we look at vulva color. If its light pink this means shes not ready if its dark red then she is. This may help you a little in your research or if you can think of a reason for this? Im guessing blood flow has something to do with this?
That's interesting cos the same kinda thing happens to dogs when they're in heat.
From watching my rabbits, I'd guess that they come in and out of heat, but are almost always in heat, like cats are if they don't breed. Like they come almost straight back into heat in they don't mate.
But I could be wrong, my friend says they're never in heat, or that they're always in heat, not sure which!