Do you recall the name of the fanfic of Harry's owl was his mom all along in Animagis form? Anyway thats odd you haven't came across that ideal as I seem to come across that at regular intervals.
Heres a fanfic maker I love
https://www.fanfiction.net/u/686093/Rorschach-s-Blot and my fav Harry Owl fic
https://www.fanfiction.net/s/6422638/1/Agent-O its odd its made by the same guy but its a rather fun fic. Hes known to make fun ones and he uses that gag on Harry and Hedwig talking in afew other fanfics