With cats, the possibilities are endless. Although rare, it is possible for cats to carry litters from different heat cycles, from different mating times and of different ages. Cats’ heat cycle occurs during the warmer weather when she begins to act strangely, rubbing against objects and rolling around the house. Female cats search for places marked by the urine of the male of her choice. She signals her intention to the male and they will mate, usually taking less than a minute. When in heat, she has multiple eggs which are released over several days allowing her to carry kittens with multiple fathers as she continues to mate until the cycle ends.