How old are they? What is the protein content of their feed? What other things are they fed besides chicken feed?
She is a 7 month old pullet. The one I think was attacking her is a 2 year old hen.
I have my feed made 16-18% protein corn/soy meal/poltry mix/ oats & sunflower seed.
16-18% should be good but it depends on how much oats and sunflower seed make up of the total intake.
If the sunflower seed still has the shell on, it will be about the same protein % as the oats which will be about 12%.
So just consider that if the feed is 16% and that is only half the diet, then the total intake will be 14%.
It isn't just total crude protein but the amino acid makeup. A couple essential amino acids have to be added to feed to make up what is missing in vegetative sources. Lysine and Methionine being two of them and that is usually just enough to maintain body. If more vegetative sources of protein are added, some of the essential amino acids are drawn down below that critical threshold.
We often misjudge how much of the diet is made up of scratch.
“Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts.
Broad, wholesome, charitable views of men and things cannot be acquired by vegetating in one little corner of the earth all one's lifetime.” Mark Twain