I live in the country. I adopted a cat at the first of the year, planning to keep her outside to catch mice, etc. Before I took her back to the shelter to be neutered they closed because of Covid. Not knowing how long this was going to last, I let her go outside. She immediately got pregnant. She is fairly young so I didn't recognize the symptoms. I have given away all but one of the kittens, hoping he will be my mouser. My problem is, she had the kittens on the back porch. When we moved them to the barn, she immediately brought them to the back door. So we relented and let her in with her kittens. Now the kitten we kept is 8 weeks old. How can I get them to be outdoor cats?