My dog doesn't like anything on his head, but otherwise he's a good sport.
He's been a devil (this was our first party where his horns were around his neck all night

)
Then he was kurt cobain. We tore up one of my husbands flannels. Hes pretty furry...so it worked.
And last year he was a stripper. We just put a bowtie on him and cuffs around his front paws. I loved this one
No ideas for this year yet...