I'm trying to get my cockatiel to trust me more, so I've been trying to feed him treats often. The problem is he doesnt seem interested in any treats I give him. I've tried giving him millets, but he never ate it. Only when he was sick he ate almost a whole spray. I would give him sunflower seeds but he has some in his food already (I'm slowly trying to turn him on pellets). I bought a whole box of cheerios thinking he would love that since a friend said her cockatiel does but mine is almost scared of them. I also tried giving him an apple and he took one bite and rejected it. The only thing he likes eating other than his daily seed/pellet food is some spinach. Any other suggestions?