yahoo cant spell
I know the dog was rapid to be able to bite three people but I think this is the word I think they're looking for: -

rab·id Audio Help /ˈræbɪd/ Pronunciation Key - Show Spelled Pronunciation[rab-id] Pronunciation Key - Show IPA Pronunciation –adjective
1. irrationally extreme in opinion or practice: a rabid isolationist; a rabid baseball fan.
 2. furious or raging; violently intense: a rabid hunger.
3. affected with or pertaining to rabies; mad.

Actually I just realised, I think I am a rabid Liverpool fan! ;) p.s. click HERE for the page! (may or may not work - I am too lazy to check. You can go to http://www.yahoo.co.uk and click on Video! Yes do that)

EDIT - I was right, the link doesn't work so just ignore it!