That does not look like worms to me. This is what roundworms look like:
View attachment 1785507
This is tapeworm (whole):
View attachment 1785508
Often times tapeworm segments will be passed in the droppings which will look like rice and move if they are fresh. The red bit looks like intestinal shed, but is quite red.
I would keep a very close eye on your birds and if any are looking off at all, even just a little, I would treat for coccidiosis with Corid (amprolium). There is a strain of coccidia which affects the cecal pouches and can cause sometimes things that look like what is in your picture. At the ages of your chicks coccidiosis is a much more common issue. Coccidia are a protozoa and regular wormers will not treat them. Corid is very safe and would not do any harm. Common symptoms of coccidiosis are lethargy, sitting fluffed up, not eating or drinking well, bloody OR mucousy droppings. I'm going to tag a few others and see what they think, the more opinions the better, I think.
@dawg53 ,
@Wyorp Rock ,
@Eggcessive