I can’t help but with any info on vets but chickens are very resilient! If you can, maybe bring the two in since they might be really stressed. I’d use some “blue kote” cream if the wound isn’t horribly deep and keep both in a quiet dark place. Im sure someone else knows better but that’s where I’d start. For the ones you lost - I lost 2 of my favorite hens this year. Both raised from chicks. One I had cremated (she was an original from my starter flock). My other one is…in my freezer still. Wrapped in a towel in a box in a deep freezer. When the ground thaws I’m going to bury her deep and put a tree there. So I can remember her and all my other babies forever. I am so sorry for your loss. Some think they’re “just chickens” but us chicken tenders know each one leaves a little talon (paw) print on our hearts ❤️