Just realized, sims 4 cats and dogs can't breastfeed

I don't need a newborn stage. I would like to be improvising. I was just for one of my sims was growing such a bond alongside being an cat lover and having the pet friend. They were just kittens from the cats in the house, so I was going to give them up, and now I have. Would've been nice to fill up the time while they stayed to care of them like that at least for a day or two.