Right now you have 22wk old pullets. They are active and healthy, you report no illnesses or concerns, so to de-worm as a "preventative" does not make much sense to me.I have had to treat them with corid before. So I am familiar with that. For the other types of worms, the best approach is making sure they actually have them? That was kinda of my thoughts on it. Thank you.
IF they were showing some symptoms - weight loss, loss of feather condition, lethargy, not eating/drinking - symptoms of being not well - then even if you were not able to get a fecal test, personally I would suggest worming, unless there was an obvious symptom that pointed to something else.
You make a good point! On deaths door....yep, I would try de-worming, maybe a few other things tooI'm all for *routine* fecals. One random negative fecal doesn't mean you shouldn't de-worm your bird, it just means that test didn't find any eggs.
There was one person a few years ago that learned this the hard way and almost lost their bird. Their bird was on deaths door so they took some poop to the vet for a fecal float and no worm eggs or coccidia were. It was suggested that they have another fecal done and that one found tons of capillaria and coccidia.
