yes -- hello...any advice would be helpful.......

I just recently aquired my first pair of red tailed boa constrictors. They are beautiful especially the one that is rumored to be female. I will post pics later, but I have a few important questions, as this is my first time caring for RTB..

Here is what I know about them....
they are related, 4 yrs old, the prevoius owner raised them from babies, they are both approximately 4 ft long(seems short to me for being 4yrs old), father was supposedly wild caught(8ft)mother CB(10ft)...they shed in one piece as i was givin two recent sheds..they are feeding on frozen mice (4 each) every other week..did i mention that they are beautiful!!..I love the grey and black colors , looks almost fake??? ANYWAYS here are my concerns.....

the previous owner handled them frequently, and kept the pretty tame. She was not able to handle the as much over the past year due to health conditions, so they have become somewhat wild...they are especially aggresive during fedding and seem to go into a frenzy, striking at anything near them until they are covered with a towel...this stops the feeding process...as shown by the previous owner??....they prefer to be fed by waving the prey in front of them and tapping them on the nose...is the feeding aggression normal or can i eventually calm them through handling and other feeding strategies...such as maybe leaving the mouse in the tub in front of them????

Any ideas will be helpful...also I love to research and any other great links would be appreciated...thanks all!!!