Know some of this is pretty dated but do see this past Feb on last post SO...
Here's a real monkey wrench to make this hurt your head a BIT more ;-)....
Have a bag of pellets by a different manufacturer but still using "Safe-guard" trademarked Fenbendazole "Type B Medicated Feed"....BUT this Equine (apple flavored) Dewormer contains a completely different amount....it's 1.96% Fenbendazole! Says for "horses only" as opposed to the popular apple flavored Safe-guard paste that also says it's also for beef and dairy cattle but.... alas we often use "off label" meds for chickens and that's why we check here to try to use others' experience to not recreate the wheel ;-)
OK- so a 5lb chicken with 1.96% pellets... anyone?? anyone??
Yes have the paste but they are onto me and let's just say last night it ended up ALL over the place in this hot weather even after having it in the freezer WITH their fav seeds over the top of each large "blop" that equals about 2 peas...
I somehow dosed them for 3 days in a row already (had read in ONE of these threads to dose for 3-5 days) but then remembered that I'm not supposed to do this if molting- not sure if this is a "true/full" molt or due to stress/heat/illness related but a molt is a molt and someone lost a LOT of feathers over a week or so....SO...
I stopped after 3 days and then 10 days later got the first dose in OK, but yesterday was a near defeat for me- did get SOME in each but def not a full dose...
BUT now within this thread I see (maybe due to being older info??) to give ONE time repeated ONCE 10-14 days later- (for any eggs at initial dosing- and for roundworms specifically)
I'm starting to think about just calling it for now and if they aren't better soon, we'll repeat Valbazen again. Just always concerned about them developing resistance due to insufficient dosing!
Got their first dose of Valbazen a few weeks after same problem with Fenbendazole in Feb. and as one still had concerning poops and pale comb/wattles- I repeated it about 3 months later. (prob should have done sooner but missed how bad she was w/ my focus on 2 others that were very sick and have since passed

)
Had MAJOR outcome from that second cycle of Valbazen- had MANY dead roundworms in poop under roosts! Mostly from two of them, including the one with still pale comb.
From all my reading here, you really shouldn't see any worms in their poop- ever- even after worming them- unless they REALLY have an overload of worms... I've only seen ONE in a broody poop a few years ago so this was a bit alarming- but "at least I caught it" I tried to tell myself but she's STILL pale and gradually losing weight... despite much care to try to prevent...
WILL say that just last night she's showing the FIRST signs of "pinking up" that I've seen in months.... so- fingers crossed!
Just don't want to drop the ball and not sure whether to stop after a questionable second day dosing on the 10 day "re-dose"... Don't want them to become resistant to one of two good/safer options in my "arsenal"...
ANY opinions- prob have to decide here before someone answers but that's why I was looking at these pellets for their dinner 'treat'...(often give fermented feed w/supplements they may need like extra Calcium/vitamins at this time)