I have high doubts that Kovu would give away the source code to Owlus. A few users and myself discussed a similar topic about the source code, and it was mentioned that, if Red knew that Kovu would be up and leaving, he would have taken the source code himself if it was offered his way. However because no one knew of Kovu's leaving since he didn't say anything - nothing could and even now can not be done. The Staff have tried many times to contact Kovu but to no avail, and it seems very unlikely that FeralHeart's creator would give the source code to someone who was not a part of the Staff team. I'd much like to see that tumblr blog, because I'm not quite sure where the author got that idea from.