Thanks so much! I would think I should do the whole flock then with the wormer, but since none of the others are showing signs of bacterial infection, I would only treat Goose with antibiotics?
If the others look fine and have normal looking poop, they do not need antibiotics. Regarding worming, mabye you could collect a bunch of poop samples from as many as possible, place in plastic bag, mix well and have the vet check or worm eggs and coccidia. Or you could just worm all of them.
-Kathy