So I am rather concerned. My girls had litters awhile back, and I dealt with the babies fine I think. I separated the genders at five weeks, boys stay with dad and girls stay the adult females. It's only been a week or two since then and Cookie is looking very plump again. There's no way the boys matured and got her before I separated them right? And she wouldn't be this chunky so soon I would think....maybe she's retaining milk now that the babies with her don't need milk anymore? My other female, Letty is still slender...she was through the whole pregnancy and afterwards when she fed, so I don't know what to think about Cookie.