Klaus wrote:

^^It'd have to be "out of Isengard", as the TTT wargs were Saruman's forces... and we know he was already doing breeding experiments. 
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You know I've never been exactly clear on where all those Orcs were before they started ripping apart Isengard. Were they hidden down in the caverns all along, or did Sauron send them and the wargs after Saruman switched sides?
It seems a bit hard to believe that one of the White Council could have orcs coming and going to his home all that time and nobody noticed.