We had the same problem at my last abode R93.
Got to the point where I was actually asked by locals that did not own a fire arms ticket if I would come and put their dog out of it's misery.
These people simply walked their animals around the estuary and the river mouth.
The remains from dead animals were turning up for a long time.
Whole animals were seen floating down into the estuary after drops,some were quickly pulled ashore and gone after reports to DOC.
Just one of the joys of living on the Coast eh.
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