Gosling can’t walk

[pinksapphire]

My goose hatched five eggs yesterday and I found one on its back in the pen today, it seems to have an issue with one of its legs.
It is pushing out to the back even when laying down.
I have had to take it inside as I am afraid it will get trampled
Any idea what the problem is and how to fix?

 

[pinksapphire]

Photos of the gosling

 

[NickyS2512]

Photos of the gosling

 

[NickyS2512]

I have one very similar- I am wondering if it has a dislocated hip joint either congenital or from trauma ( eg trodden on by mother goose) I don’t have any answers though. I have a vet appointment but not until Monday morning, and have removed the gosling to a brooder.