Please share pictures if and when you can 

Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.

In my experience feeding a snake red blooded mammals makes them more aggressive. I recommend poultry or fish.
I know many a herper and have kept herps (including snakes) myself and have never heard of this. To me it sounds like myth, or there are other circumstances at work. Perhaps you've happened to acquire animals who are more aggressive in general? Rodents are more readily available than quail (for such small snake) or fish, which make them a better food choice for most. Given that most snake keepers feed mice or rats to their animals, I'd figure it would be a big issue for them all if it were true...
Also she is 5ft would she be ok in a 3ft vivarium?
She also has not been handled in a year so how would i go about holding her.
Sorry for so many questions im new to corn snakes