Star Milling Company is down the street from me. I have had to use it in a pinch when Mazuri didn't arrive. On the Star Milling stuff my output dropped to 5-7 babies on experienced moms. I also noticed a few moms that delivered stillborns (undeveloped).... I am faithful to Mazuri because my rats are healthier and production is back at around an average of 14 but I have had 2-21 litters 1-22 litter and 1-23 litter. The star is about 21.00 a bag. I pay 30.00 for my Mazuri. There is 0 thought involved in this.