My chicks are about 7 weeks old. They're friendly(the BO is a little aggressive) and healthy. They will not eat anything except chick starter and grit. I take them outside often and they have no interest in eating grass or bugs. They pick up a little grit but mostly just look around and sit on my lap. I've tried yogurt, strawberries, canned cat food, salmon(a little interest there-not much), coffee cake, parakeet treat seed, sunflower seeds and I don't remember what else. They eat chick starter readily from my hand. I tried just leaving the treat with them. They throw it in the litter and trample it.