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I think other mammals do have a cycle.... a swift google suggests that horses have a 21 day cycle during the breeding season, bitches have a 120 day cycle, cats will go on and off heat at length about 2-4 times per year unless bred/spayed.I've a residual idea from somewhere that female guinea pigs will ovulate when near males, but I've no back up for that.
The rabbit does not show regular estrus cycles: that is, recurring periods of sexual desire. Ovulation in the female rabbit is induced by mating and occurs approximately 10 hours after the female is bred.