spring mix is always good and easy...they can eat the same storebought greens as any other species, just no fruit, etc. I've also used tort-safe dried herbs and weeds from rosemountainherbs.com, like dandelion, marshmallow, red clover, violet leaf, calendula, hibiscus flowers, etc. I put the herbs in a bowl with mazuri, moisten them and mash it all up...about 1 teaspoon of herbs per pellet is the ratio I use. Chris also uses this method, especially in winter when fresh food is harder to find/grow. This method is a bigger upfront purchase, but the stuff lasts forever and is easy peasy to make...and the easiest way to get weeds short of growing them.