Your geese are beautiful and looking at pics isn't the same as right there in front of them or hands on. especially when it comes to body weight, can't feel the keel to see if it's bony for one things. feathers cover a lot. So there you have it we have tried to explain what is best for your geese and I am not an expert by any stretch of the imagination, I've learned a lot since having water fowl over 9 years but I know I still have a lot to learn. Maybe Clint will share if he has knowledge about nutrition for geese. I think if your gander is having issues with his eyes you might try getting something to put into them made for water fowl, maybe he has picked up some kind of bacteria from the river. I wish you all the best in caring for them.