I recently downloaded Metzcal herp software. I heard it was complicated but decided to give it a shot anyway as i'm a pretty patient person when it comes to inputting data. Its working great for my snakes. It has a place for litters, cage cleaning, animal feedings and other stuff too.


Its completely free for the full download. Make sure to download the instruction manual just in case you need it (i did for a couple of things).

Long story short, it should suffice for keeping track of your rat colonies.