The first source I posted was from an elderly Webster's Collegiate--I have access to the OED online but didn't bother to logon at school to check it. I'm glad someone did. Webster offered no citation or date for the Hebrew source of the word.

I can certainly see how the dogs in the chase would be jubilant--hunting dogs in a hunting situation would relish the task at hand and enjoy it. Since there appeared to be a line in the song that switched the point of view to the fox, it didn't hurt to consider the homonym. Nerd's illustration of the process of mispronouncing (or misunderstanding) is as likely as any other explanations here.

SRS