Slow, thin chick that drinks a lot

[Altairsky]

Yeah I gave him liquid paraffin (the food grade mineral oil used for winemaking). His dropping were completely normal the first time his crop got unstuck. All chicks had been on medicated food so I'm trying sulfa antibiotics in the water now for this one chick.
He's also on baby vitamins with sugar.
He's alert but not standing and he has curled toes. 3-4 weeks is too young for marek so I guess it's vitamin deficiency from malnutrition?

 

[Altairsky]

This is the last poop. They eat all sort of bugs, especially japanese beetles so the black pieces could be those.

 

[Altairsky]

This morning he pooped a piece of plastic (the string used to close garbage bags) so it's likely hardware disease.