Momma should be eating kitten food and as much as she wants. I gave my Bella (she was a stray at the time) Royal Canin Baby. I also gave this to Misty (pregnant kitty I took in 2 years ago who is now living the good life with my hubby's boss). The one I am feeding now (she won't let me near her and her kittens are already weaned...didn't know she had them at all until they showed up next door about 2 weeks ago), she and babies are getting Forza 10 (it is a vet brand from here given to us by ENPA...they are our SPCA). So, kitten food and the higher the quality the better especially in the first month when they are only feeding from mom.