Great Brewfest Kodo

Hello, i really like brewfest kodo mount but this thing can't pass through sewers entrance (i just get stuck in an arc) which is quite frustrating. Mammoths have the same problem. Well i dont care about mammoths but brewfest kodo...
So is this supposed to be like this or is it a bug?

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You can goto Gadgetzan in Tanaris & complete the chain quests from Marin Noggenfogger so you can buy Noggenfogger Elixir from him, drink them until you shrink down for 10 minutes, you'll fit through when mounted on it then ;)