I also use old fashioned oats. No instant, no flavors.
Keep in mind that they need moisture too. I put in a couple large chunks of carrot, leave it 24 hours +/-, feed my boy his dinner, then throw out the carrot chunks. You don't want the carrot in there for extended periods of time because it will mold and that's the last thing you want in your Supers. ? After another 24-36 hrs, I add more carrot, leave for about 24 hrs, feed my boy and trash the carrot. I also make it a point to know how many chunks of carrot I use so as not to miss a piece that could mold. Usually 3 large pieces. ?
My boy Petey is about 3yo so he only gets his Supers every 3rd day, but big salads of greens and veggies daily.
This is just the way I do it and it's worked well for us.?
-Dee