I didn't get a lot of litters from my regular rats this winter. Though, I did switch to just hog feed. I have started to get a few litters since it's warmed up, but only litters of like 4-6. I think I'm going to add in some mazuri to their hog feed and see if that helps with bigger litters. But with my asfs, they have been been making lots of babies lately(only have had them for a few weeks though)