You can worm them today, or wait until the Denagard is finished. When the chicks are 8 weeks old you could get the fecal float, to see if they have worms, worm them, or wait to see how they are behaving then.
Any pictures of possible worms are welcome here. Okay, I would not worm baby chicks at all until they are at least 2 months old. If you have Valbazen, shake it well, and give your chickens 0.08 ml per pound—not 0.8–orally once and repeat that in 10 days. Valbazen kills live worms, and the second...