Greens can contribute extra water to the stools and it can make them a bit thin, but diarrhea, no.
I would not give greens for this situation, though. In case there's a blockage, it could aggravate it. It wouldn't hurt to give the chick some coconut oil. If there's a blockage, the oil, more than anything, would help.
Chill the coconut oil slightly so it's solid. Measure out a teaspoon, then slice off small bits and put them into the chick's beak until all of it is in the chick. Gently massage the crop to disperse the oil and then watch to see if it passes a healthy turd in about an hour. If it seems still to be struggling, give some more oil.
I would not give greens for this situation, though. In case there's a blockage, it could aggravate it. It wouldn't hurt to give the chick some coconut oil. If there's a blockage, the oil, more than anything, would help.
Chill the coconut oil slightly so it's solid. Measure out a teaspoon, then slice off small bits and put them into the chick's beak until all of it is in the chick. Gently massage the crop to disperse the oil and then watch to see if it passes a healthy turd in about an hour. If it seems still to be struggling, give some more oil.