This place kicked me hard in the feels today ("Animal Clinic"), so it's only fair I kick back...only not quite as hard. Here's KTurtle's "The Story of Granny Pie" from FurAffinity. It's from way back in 2011 so it's grown way-off-canon, and KTurtle is known best here (if at all) for weird fetish stuff, but this is still one of the sweetest MLP fanfics I've ever read, about a character we never really got to know outside of that one song.