A few days ago I found roundworms in our chickens poop...I’ve treated with the first dose of safeguard, and am seeing worms in their poop again (it’s been 2 days). Is this just the meds working and getting rid of what’s inside?
It is likely the meds working. After completing the course of safeguard, I'd wait a couple days and then have a fecal sample read to see if anything is left.