Do not breast out or gut your bird if you want your trophy mounted. The best way to preserve your bird is to place it into a plastic bag and freeze as soon as possible or put it on ice.
Concerns with any bird may be pin feathers (feathers that are not fully developed) and the overall plumage of the bird. Another concern is shot or damaged feathers, some feathers may be fixed or repaired, such wing or tail feathers. Blood on any feather is not a concern or problem because birds are washed and it comes out when soaked in a solution.
Getting a specimen that is fully feathered is essentail to a quality mount.