Buffer head shaking

[Illazin]

Hey i have heavy buff chicks and he is shaking his head again and again and still not eating anything. I gave him egg yolk ,sugar water and yogurt.but found no improvement. I have to give him food forcefully. Plz help me. Right now i have 3 chicks

 

[Wyorp Rock]

https://www.backyardchickens.com/threads/head-shaking-chicks.1366152/