Your flock will be far happier and more peaceful with 5 hens and 1 drake. Things will get far worse in the Spring if you still have too many drakes. If they have access to water, multiple drakes breeding the same hen in unision or succession can drown her. Overbreeding can also injure the hips and pelvises of the hens. Drakes trying to breed a hen at the same time can also damage eyes and cause blindness. Please consider limiting the number of drakes for the safety of your hens.