Combining Flocks

Got two coops and runs and we are finally combining them.

We placed the girls in dog kennels within the run of the first flock, and separate them at night into different coops. We plan to do this for 10 days before trying to introduce them without the kennels.

The rooster is trying to attack them and has left some bloody marks on their combs, through the dog kennel wire

Any suggestions on to make this transition smoother?