My hand raised pigeon, Noah, will not eat the larger seeds in his food mix, like the oats and died peas. He seems to only be eating the millet and other small seeds and occasionally I see him swallow bits of cracked corn. He tries to eat them but he just picks them up in his beak chomps on them and them drops them. I started feeding him frozen peas at a young age and he will still eat them readily today but he won't eat anything else of similar size like sunflower seeds or peanuts. He seems to really try to eat the peanuts but can't get them down. Even if I chop them up really small he still can't eat them. I've also tried chopped hemp hearts and even though their smaller than what he normally eats he still can't eat them. At first I thought it was because he was young but he's eight months old now and still having this problem. And I've fed whole peanuts to feral pigeons younger than him and they were able to eat them. Why can't he eat large foods?