DVD - The Best of Dr. Seuss (bonus, USA Turner print, uncensored)
The scene of the Peter Lorre fish seeing Horton on the boat and asiding to the audience, "Well, now I've seen everything" and shooting himself in the head was censored when it aired on TBS, TNT, The WB, and Cartoon Network (barring its appearance on The Bob Clampett Show) and is now airing censored on Boomerang.
The version of this cartoon shown on the TNT special In Search of Dr. Seuss redubs and re-edits the entire short, and also removes the opening and ending title cards from the Blue Ribbon reissue.
This is the only Looney Tunes short based on a Dr. Seuss book.
The original titles have been found but have not yet been restored for DVD.
The AAP print uses the 1955-56 Merrie Melodies ending card for reasons unknown.
The LaserDisc print changes the ending title to that of a 1949 or 1953-54 season ending Color Rings scheme plastered with the 1946-55 Looney Tunes music for reasons unknown.
"Horton Hatches The Egg" was adapted from the Dr. Seuss book of the same name. Horton and the Peter Lorre fish were voiced by Kent Rogers. Mayzie and the elephant bird were voiced by Sara Berner. Frank Graham narrated. Mel Blanc performed most of the other voices.
The Turner "dubbed version" print retains the 1941-55 MM end music (applies to both the USA and EU prints).