I adopted a young female cat one week ago. She had kittens 6 weeks before I adopted her and was lactating when she moved in with me. Since then she has been eating a lot and has noticeably put on weight -- she looks wider and is heavier and harder to pick up. She got pregnant with her previous litter because at least one tom cat shared her prior home. Given her rapid weight gain I'm wondering if she's pregnant again. How likely is she to have gotten pregnant while nursing given that she continued to live with the tom(s)? If she is pregnant would she still pink up even though she has been nursing until recently? (Her milk appears to be drying up slowly -- would this happen if she was with kittens?) I took her to the vet and he couldn't feel anything, but said it may be too early to tell.