If they are fighting over treats like you describe, then you are hand feeding the treats?Sure thing!
I hadn't given her any meds yet! I will put her back with the flock.
Also, what can I do about them fighting? Only 2 of my hens hate each other and they fight a lot when I am handling out the treats. So much so, my hand gets caught in the fire and I have a peck or two from them. They even bleed themselves a bit from the wattles and the comb. I always have to pick one up and separate them entirely.
Scatter treats far and wide - this spreads the flock out and lessens aggression over treats. Your gathering them all in one small space and just doling/handing out treats creates competition between the birds. Cut out that activity and you will see less fighting.