I ended up going with the sow and pig complete. (the green bag) because it was the only alternative they had other than regular hog feed. I will take a look at the label and post any different ingredients / percentages that may be listed on it. It has 16% protein.. But also contains corn (I think as the first ingredient). TSC said that they couldn't order mazuri unless it was on their ordering sheet, but I am going to check with other feed stores in town.

The sow/pig feed cost $13, so $7 less than I pay for the NE now. I am considering mixing the hog feed 50/50 with the NE for my males, but keeping my females on NE only, if you think that would make a difference in their health or ability to produce litters successfully. If the hog feed is just as good, then I can use a 50/50 mix for both genders.

The feed is in smaller pieces than the lab blocks. Will this effect the rats ability to grind down their teeth? I provide them with a lot of cardboard to munch on and wood toys as well, so I wasn't sure about that aspect of it.

Thanks again everyone for your help!