Agree w/ aart.
The best thing you can do is cover the top of your run. Netting or wire will do.
And may I say that Bouncer is a very handsome fella! Best wishes!
Golden Comets are fast to mature and start laying at a younger age than most chickens.
Mine started laying at 18 weeks, which is 4 months. They were Spring babies, though. Time of year makes a difference.
Good luck to you!