I have never had anything this bad but bcthis injury looks like it shouandld have a vet visit. But when one of my. chicks got her tail feathers ripped out, I put lithium car grease on the spot that was bleeding. this method kept the other chickens from pecking, it also helped the wound heal. another suggestion is neosporin....I hope this helped and good luck I hope she/he feels better
I'm sorry to hear about your quail! That does look pretty bad. But, don't give up. Many birds recover from serious injuries. First, if you haven't already, isolate the quail from other birds. You don't want other birds picking on it, as they love blood's red color. You'll need to keep it separate to heal properly. I'd gently wash the wounds with some warm water, then apply an antibiotic ointment without any " -caine" ingredients or painkillers. These can be harmful to chickens, and I assume, also quail. Apply this antibiotic ointment every day. Infection is possible. If you begin to notice a bad smell or odd discoloration/heat, you may need to start antibiotics.
Good advice. The worst thing is the stress. This is where vitamin-electrolyte-probiotic dispersible powder should be put in the bird's water daily. Make sure the bird eats, and always keep game birds, chickens, turkeys, waterfowl separate from each other.