Yeah there’s a reason for that. Not a lot of people have geese, there’s less goose owners than duck owners and those are far less than chicken owners. There’s very little info out there, most of which is from owners personal experience and being honest that isn’t always great, you should never necessarily just trust someone’s word for something, even from me, I’m just a voice on the internet, and I could be wrong about a lot.
A lot of us have different methods for treating illness or feeding because we’re mostly going off of what we’ve learned from other goose owners or from our own experience, and unfortunately there are also people that will act like they know what they’re talking about but actually know nothing and have no experience with geese, I haven’t encountered that here but I have seen a lot of it on Facebook, instagram, and YouTube from wannabe influencers.
For actual medical and dietary information, there’s few resources and they do very quite a lot, most research for poultry goes to chickens being the most numerous animals raised for meat and eggs and being more common in backyards, ducks have much fewer studies, and geese even less, which is why there’s often no choice but to guess at drug dosages by basing it off of how one would dose a chicken.
It’s a.ways important to do your own research, collect as much information as you can from articles and other owners, and care for your birds the way you think is the best way.