Within six to eight weeks
Answer by shesallgirltalk (30). Cats can often come back into heat a few days after giving birth, so it would be best to neuter a female cat as soon as possible after giving birth to kittens. The female cat will waste no time to come back into heat so it would be best to keep her away from any males until neutered. Even if she were, the old wives story about female cats being safe from pregnancy as long as they are still nursing kittens is simply not true. Actually, most cats will have an estrus cycle (the technical name for heat) within six to eight weeks after giving birth. In rare occasions, a cat will have an estrus cycle within a week after her kittens were born. Typically anytime from 4 weeks to 3 months after giving birth, depending on the cat and time of year. That being said, a cat does not need to be in heat to get pregnant. She can get pregnant only a few weeks after giving birth, sometimes as quickly as 2 weeks later. Back to back litters are hazardous to her health. It is possible for an unmated female to cycle every 3-4 weeks indefinitely. Cats also have an estrous period 1-6 weeks after giving birth, so a female may be nursing one litter while pregnant with another. A cat can give birth to anywhere from 1 to 6 kittens. These kittens can start mating and producing more kittens at the age of around 6 months. A male cat can impregnate countless female. The duration of estrus (heat) varies in individual cats. Heat lasts an average of seven days, but may be as long as 21 days. If a female cat doesn’t mate and become pregnant, she may go back into heat repeatedly, with only brief periods of non-heat – as little as two days – between heats! Best Answer: Cats can get into heat within few days after giving birth. I would most likely report them to the humane society or at least contact them if there is any option you can do to convince them to get their cat spayed. A cat typically goes right back into the heat cycle after giving birth, making her physically capable of becoming pregnant again. The heat cycle in a female cat occurs seasonally in the spring and fall, and she may go into heat several times during the season.
http://snippets.com/how-soon-after-giving-birth-can-a-cat-go-into-heat-again.htm http://cats.about.com/od/reproduction/f/How-Soon-Can-A-Cat-Go-Into-Heat-After-Giving-Birth.htm https://uk.answers.yahoo.com/question/index?qid=20090929103427AA5ZSP5 http://www.catster.com/answers/question/how_long_does_a_cat_stay_in_heat-26780 http://www.athenshumane.org/spay-neuter/the-importance-of-spaying-and-neutering-cats/ https://answers.yahoo.com/question/index?qid=20110627215758AA2Fje7 http://www.ehow.com/way_5545240_soon-cat-pregnant-after-delivering.html
how long does it take a cat to go into heat after giving birth