I have some outside/feral cats. One has kittens that are 12 weeks old. I noticed an intact male hanging around momma cat today. She was not receptive to him. I've had a couple of other cats who had a litter of kittens and were still nursing them even at 5 months. I got them into a low cost spay clinic and neither one of them was pregnant. I'm wondering if this current one is coming into heat. Our low cost clinic has been shut down due to covid-19. They were just starting up as of last week. Only those whose appts were cancelled are being scheduled right now. New appts will probably be in Aug or possibly July. This cat is still nursing her babies. So could she be in heat already?