Usually not recommended to mix scratch grains with 'regular' feed ration as they will go for the grain and waste the feed.
Do you mix it half and half?
Say your grains are 8%, look at the label.
1 part 20% + 1 part 8% = 28% divided by 2 = 14% protein.
That's if they are eating an equal portion...
Did Shadow molt this year?
She may be molting...and doesn't want to be mated so is rejecting his advances.
A bird being killed both put them in panic mode and spurred a pecking order change.
They'll be jumpy for awhile but should calm down soon.