No, they can't digest the alfalfa and won't thrive on that food. I buy Mazuri 6f for $18/50 lbs, so it is a little cheaper than the rabbit food, and I know that my rats are getting a balanced diet. You can also try one of the "people-food" mixes (as I call them) for your rats, if the Mazuri is out of reach.
Thank you. Good thing I asked
I'll probably try to pick up some Mazuri from White Plains tomorrow. I have been feeding low protein dog food but its causing the nasty poo problem ( I assume due to the meat content )