Last year was my first attempt at chickens, bought 9 from the local feed store, pullet pen mind you...
(all 9 on the roost)
(4 of these...Australorp)
(5 of these, Barred Rock)
ALL ROOSTERS!!
They all did fine together, all crowed, all strutted, all play fought...I had no pullets to protect so no issues....they have all been re-homed and
now I have 3 roos, (soon to be one less) and 16 pullets....
They should do fine together...in fact the 2 roos I am keeping, the Alpha is now allowing the 2nd in command to crow and breed with the girls...
they were raised together though...so there is a "mutual respect" I suppose! Although Alpha roo, does NOT like him to breed to his fav, a RIR I have...!
**You have 15 hens and 5 roosters? Hmmm....my guess is you will be getting rid of several...I have read 1 roo to 10 girls...I have 2 to 16 and I think this is just right...
good luck to you though...but as the girls reach POL, you will see who is in charge and who is useless in the flock...good time to re-home or freezer camp them.