Chick lethargic, was it grubs?

[Maqui25]

Hi, yesterday night a relative brought me an orphan chick she found, about a couple days old I guess, to take care of. It was very active yesterday, drinking and eating. I gave it 3 alive white grubs yesterday and put it to bed with heat source. This morning it's lethargic, doesn't open it's eyes, doesn't eat and barely drinks. There's 2 little black poops where it slept too. Sadly it looks like it won't make it. Was it the grubs? Maybe it was too much, or toxic or it got stuck. But my other chicks love them so I don't understand. It was so healthy yesterday.

 

[BigBlueHen53]

Does it have any chick grit available? Baby chick feed has a little grit in it for digestion, but if you feed it anything other than that, it needs grit to digest it.