I don't know about Green Cheeks in general, but Westley would eat anything. He'd even try to eat things that weren't food! He loved everything. And he was always eating. He did like to hold things with his foot too. He stated on Zupreem (that's what the breeder fed him), then we got him to eat TOPS. He actually liked the TOPS better, but I did a "mix the food" transition, just so his body could get used to the new food. He got a very varied diet. He'd eat all sorts of fruits and veggies, beans, nuts, grains, etc. He got some seeds (usually Nutriberries or millet), but not too much, they were used as a treat. And his TOPS pellets helped balance his diet. He was so not picky, he never met a food he didn't like. He never hesitated to try a new food.