So far I've tried watermelon, apples, pears, grapes, HB eggs, dried oats, sunflower seeds, carrots and homemade bread. It's a tie with 100% homemade whole wheat bread and sunflower seeds. They do not like fruit at all and they will pick at the cooked carrots(won't eat raw). They get sunflower seeds daily. I'm trying to supplement with healthy foods for the vitamin intake. I will keep trying. I have some strawberries that need picking. I'll try those today.