Steve O'Shea said:.... and if that doesn't work you could always glue 4 sausages to your dog and pretend it's an octopus.
A sausage dog? Its been done before I suspect.
Anyway any self-respecting dog (i.e. one that doesn't go on "Thats Life") would try and eat them.
I'd recommend making the extra arms out of 4 socks or 2 pairs of tights (for small or large dog's respectively) and stuffing them with torn up newspaper or something similar. The larger dog could also have a couple of those large snake/worm draought excluders tied to them (if you happen to have a couple spare).
Hmmmmmmmmmm Halloween costumes for dogs? Now there lies madness:
www.i-love-dogs.com/canine/dog3975.html