Thread:Stolen5487/@comment-31330278-20190910190921/@comment-31330278-20191028212600

TV Tropes' WMG pages explains it better:

https://tvtropes.org/pmwiki/pmwiki.php/WMG/CourageTheCowardlyDog

Press Ctrl F, write "Katz is actually Red" and you'll find it there. I also have an extended theory about Eustace's origins.