What breed of dog was Sirius in Harry Potter & the Order of the Phoenix?

Answer 1

looked like a scottish deer hound
http://www.dogbreedinfo.com/images12/ScottishDeerhound100_0140.JPG
http://www.youtube.com/watch?v=VoOsm5aIPDk

At first I thought it was an Irish Wolfhound, but it's not even close to tall enough..
http://www.youtube.com/watch?v=DfNJmNtN48Y (this one is the Irish.. they look very similar)



Ah ha.. found it..

http://www.petconnection.com/blog/?s=padfoot

No doubt about it.. I wanted to be 100% sure before I stopped looking.. It is under the part about the two with Malfoy

Answer 2

It almost looked like a black labrador retriever... but with a longer shaggy coat...