Fat African male, or surprise female goose?

[FenrisMau]

We've raised two baby African goslings from Metzer farms. We paid for 2 females. However, one is larger overall, has a blockier head, and starting to make different noises now at 5 months old. This apparent male is named Brownie. HOWEVER, Brownie has some very saggy britches, and my mate insists I'm feeding him too much. I see he does have 2 lobes underneath, but there's an additional pouch behind that kind of looks like an egg pouch. Regardless, it almost seems like the weight of everything underneath inhibits his walking some. It's started to worry me a little. I've attached a photo of Brownie.

1. Is it possible for Brownie to be a female?
2. Could I be feeding him too much? The other goose (definitely a female, Lizzy) does not have all this hanging skin and her pouch is not near this size.

 

[Goosebaby]

What feed are they on?
Can you post a picture of his/her rear from the back?

 

[Goosebaby]

Also can you explain more what you mean by him/her have trouble with walking sometimes due to the pouch?

 

[FenrisMau]

What feed are they on?
Can you post a picture of his/her rear from the back?

Hes 5 months old, on New Country Organics duck layer feed. Ill have to get another pic of the rear tomorrow.

As far as the walking, its not like a niacin issue, its more like hes trying to walk around the skin rolls? Kind of rotating his body as he slings each leg foreward. He gets around fine still but it looks awkward. Its hard to explain, but the other doesnt walk like this. Itd be easy for me to send a video if you had Telegram, not sure if ya do though.