Fifi Trixibelle is NOT even in the 2003/2004 pictures. That is her sister Pixie in the 2003/2004 who was misidentified as Fifi. Pixie looks the same throughout the years in the pics you presented, and so does Fifi. Fifii is a big girl throughout the years in all those pics, but i don't see her getting bigger & bigger or anything.
Side note: Tiger Lily is adorable. I've always been so glad Sir Bob adopted her, made her part of the family, and raised her along with her sisters. She looks like a happy little girl.
