They tried that with putting chinese pheasants In my area.Even though you couldn't hunt them for 4yrs in that area they found out alot died anyway.
They were after a hardier bird and thought the breeding of the chinese pheasant
with our own would produce this.They did surveys every year for 4yrs and found that the birds survival rate was no different then before.I am talking about pheasants not deer but just wonder if it may not be much of a differents overall.Also you would have to put a limit on the new bucks somehow or you would be defeating your purpose.