For anyone interested I just found a 720p HD full screen version of Fox and the Hound! (the Bluray was cropped)

It seems better than the NTSC DVD:

Although the titles seems to be in German (is it?)

It doesn't seem so in the first comparison, but the grain has been preserved:

I'm not sure though if the English audio is perfectly synced to the image. Haven't seen it yet. Just seen the screenshots.

Also I found an HDTV 1080i version, but that one seems to be 3 minutes shorter and i don't know about its quality.

edit: Oh, it's shorter because it's 25fps, and I think they say it doesn't have good quality.