Lady Of McCamley Gave some Great Info. Read what she wrote about 3 times----alot to take in and all true. Wazine is a good wormer but there is some worms that it will NOT touch---like tape worms----So My Thinking is Why Half Do a worming----I use the stuff(fenbendazole) that will get them all. Your hen might not have tape worms or hardly any worms----Then she Might be loaded---we do not know. I have Never wormed a hen while she is broody----I can not see where it would be a problem, But I never tried it.
People do things different-----"I" would Never feed my broody hen while she is sitting on the nest-----for Sure Not the Last 3 days. The last 2/3 days the hen does not want to get off the nest-----because she knows the eggs need a higher humidity to hatch----she increases the humidity by staying put. Feeding her in the nest during that time will do one of 2 things because she will have to poop----she will have to get off the nest which is not good while the eggs are hatching or she will poop in the nest which is not good because a broody hen drops a huge load and it creates a Mess for the chicks. By not feeding her in the nest the other 18 days she will keep getting off the nest to eat, drink, poop, exercise, etc. "I" would Never take her off the nest----for sure not the last 3 days nor would "I" ever tilt or lift her the last 3 days. I set many broody hens-----33 last season----"I" move all of them to a hatching pen---then I do not have to check under her for added eggs from other hens----once she is in the hatching pen-----I do not bother her at all---just feed and water. When I see her off the nest eating etc-----thats when I look at her eggs----when she is due to hatch----I check on her 2/3 times aday----just to view-----Not touch----when she comes off the nest with her chicks---If there is a egg still in the nest I look/check it to see if its pipped etc----I remove any egg/shells---clean the nest for her and her new family.