Come on, you don't need a trailer for your dog.
https://search.yahoo.com/yhs/search?p=image+of+dog+on+bicycle+riders+back&ei=UTF-8&hspart=mozilla&hsimp=yhs-004
(I hope the video isn't from Korea, could be the guy is transporting his lunch.)
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Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1