I'm getting depressed 😭 and

Feel like a failure my oldest who will be 4 next month.. used to eat so much all of a sudden hes soo picky... there is days hes on milk all day and there are days he will eat something he likes I get so happy when he eats something. I have tried everything from giving him what's cooked to makin new things and I give up... my 2nd baby who will be 2 next month eats anything and everything even will take the oldest food.

Oh yeah and I feel like he is hungry but wont eat idk he will put toys in his mouth or chew on paper.. 😭

Also any vitamins I can give him? He likes gummy maybe I could try to give him something he isnt getting all his nutrients ugh.. i have his appointment next month I'll talk to his doc than but for now I just need some advice idk just feel like I failed I wish he wasnt picky.