Any thoughts on supplements to aid in weight gain ?
My male pied zebra is loosing weight while helping raise 2 chicks with his mate . Mate seems fine .
I'm concerned he's getting too skinny as I can see his breastbone now

The chicks are approx two weeks old . I've no foster parents available . These are petstore birds . No , I haven't dewormed them . ( can that be done safely while chicks in nest ? )
Parents have free choice seed mix , cuttlebone and fresh water daily with liquid vitamin added . Homemade eggfood ( whole cooked egg w/shell and veggie mix ) once a day and millet spray twice a week .
Increase eggfood ? Add something else to diet ?
Thanks