Give it to a rescue shelter. Rats will get kidney failure from too high protein. They only need 16-18% protein for breeding/rearing.

Nutro is crap cat food anyway, alot of fillers, but the shelter will appreciate it.

Rats need a high quality diet to thrive and grow. They shouldn't be bred at 2 months of age, where in the world did you hear that? It's like a 9 year old girl getting pregnant. It's possible, but is it good for them? NO..

They need to be 4-6 months old and over 250g. If they are not, then you need to separate them. They need to be robust, well-fleshed, healthy coats, and have enough body weight to successfully breed. I would separate your rats, make sure they have same-sex buddies, and let them grow up.

Find a Purina Mill feed store, order some Mazuri 6F or 9F, mix up a mixture of dry pasta, cheerios, total flakes, long-cooking oatmeal, and a few other whole grain cereals, and you're good to go.