Has he been producing droppings since you fed him? Is there no way you can get a handrearing formula from a petshop? If the crop is slow again, only feed diluted warmed up applesauce and massage every time after giving. A yeast infection slows the crop down, so one can't expect him to be cured in one or two days. It's just important to make sure food gets digested.
update :thank you all so much i learned a lot of things from your comments he is so much better and healthier and the crop now gets completely .empty at first i really didn't know what to do
rally thank you so much 🥰🥰🙏 he is now walking😁
When he starts eating seeds by himself and drinking water, you can add apple cider vinegar to his drinking water twice a week. This helps to keep them healthy. The ratio is 5 ml acv to 1 litre of water.