Thank god it wasn't mine... Speaking with one of the locals at the dog park today, he has (had) two Bull Arab cross Great Danes. The smaller had a bit of Leopard Dog in him too, he's the one that got bitten. Raz. Great dog, good natured and well trained.
He had them out bush on Thursday and all seemed fine. Got them in the truck to go and wasn't until hours later they noticed funny behaviour from Raz.
An hour later his body went out from under him and all he could move was his head. Foaming and coughing and all the rest.
Rushed him to the vet who figured it out, did the anti-venoms and whatever they do but it was too late. Lost him to it

So it's heating up and they're coming out... Be careful all.