Agreed with above.
#1, get a professional trainer involved to help with training respect issues..
#2, stop feeding COB, the corn and oats can make horses very hot, so unless you know your horse very well and know they can handle, I would not feed it to them, but that is only in the case of oats... Corn is very very easy to overfeed, making horses extremely hot, and also just has a bunch of weird stuff that can make horses act weird.
#3 I would just feed Grass hay, but with that little Alfalfa it probably would be okay.
“Good things come to those who wait… greater things come to those who get off their ass and do anything to make it happen.” - Unknown