I am so sorry you had such an experience with Metzers I think John Metzer is on BYC maybe he'll see this so he can talk to his customer service. That is no way to talk to a paying customer especially when they lost one of their goslings.
I hope these goslings can get settled and behave themselves.
Get some Blue Kote from TSC it is the best for hiding a wound and helps heal too. It stains so be careful using it.
I have no idea why this white gosling is being hurt like he is, I just received 4 Runner ducklings from Metzers they are doing great with each other, I believe I would text email...