One of the reasons your rooster may not have show issues is the fact that your adding ACV in there water, The ACV was neutralizing the Calcium.I have a huge white rock rooster that is probably between 4-6 years old, and he has eaten laying pellets as long as there have been hens around old enough to need it...and he has not one issue...So laying pellets won't hurt your rooster. I also give ACV in all the water...
I have just recently decided to give the flock raiser a try and see how it goes. My hens ate a lot of chick food for a few weeks and their eggs were all larger, and their shells were no softer...so...I bought a bag of 20% flock raiser this time...I am getting ready to order a few ducks and turkeys, so when they are here they will get the flock raiser, and I think I will just mix the flock raiser and laying pellets for the chickens...I think that will make everything perfect. Enough calcium, and more protein so I can keep getting those larger eggs.
We personally eat our extra roosters...so no worries there. I think you might be a little over protective...
Chris