Molasses can be used one time to help with constipation or you can give them a little applesauce.
Photos of your brooder and your chick's vents would be helpful.
How old are they?
How warm are you keeping them in the house, do they all huddle constantly on the water bottle and under the light?
As suggested by @ChickNanny13 see that they are drinking and eating their normal feed. Also if you are giving them anything besides chick starter (they are on grass/eating oatmeal) they need grit.
Photos of your brooder and your chick's vents would be helpful.
How old are they?
How warm are you keeping them in the house, do they all huddle constantly on the water bottle and under the light?
As suggested by @ChickNanny13 see that they are drinking and eating their normal feed. Also if you are giving them anything besides chick starter (they are on grass/eating oatmeal) they need grit.