I don't think that should be right. I think it's the same in CT....but it shouldn't be. At least rabies shots are required for both. I think the laws should also be the same. You also are required to pick up your dog's waste, they are not allowed to s.hit on others' property....why should cats be any different? I hate digging up cat s.hit. I have enough of my own (indoors)! Besides being so totally inconsiderate and thoughtless.
As far as # of litters and cats getting pregnant, back in the 1960s when there wasn't the problem there is today....we had a cat that was getting pregnant about three times a year. The gestation period is 60 days. But all of the kittens were spoken for before they were born; in fact we would get calls all the time to see if we had kittens. With 4 kids in our family, the kittens were socialized well.
But I certainly would never do that now!
Barbara JP