My goose baby Charlie was attacked by my 2 drakes. Please help me!

His/her eye is messed up and now his face is swollen up. What can I do? Holiday weekend and no vet around that will treat poor Charlie. What can I do for him? He is drinking water but as far as I can tell he hasn't eaten anything and he is pooping greenish poo. Is this a sign of infection? Can I give him an injection of Penicillin?

I already posted in the goose section but wanted to try this one as well and hope I got some responses and here is the link to that:

https://www.backyardchickens.com/forum/viewtopic.php?id=513567

Please help I am so afraid he is not going to make it. What can I try to get him to eat? I will try anything so I don't lose him.

thank you

Lisa

First 2 are from yesterday evening right after it happened:






And these are from today: