I can see a couple of roundworms in the photos. I would get Valbazen online or look for it in feed stores. Dosage is 0.08 ml (0.5 ml for a 6 pound chicken) and give it orally, then repeat it in 10 days. SafeGuard Liquid Goat Wormer may be easier to find in stores, and dosage is 0.23 ml per pound given orally for 5 straight days. If one has worms, they probably all have worm larvae.