Who let the dogs out...

I'm sorry, but can someone explain to me whose disco biscuits that scruffy, little dog had eaten at Josh's birthday party? When it launched itself at the hedge and tried to wrench 10 yards of shrubbery from the ground with its bare teeth, the plant shook so violently that I was half expecting it to transform into something much more sinister than screening flora. It isn't usually that hyperactive......is it? The dog didn't look that calm either.