Five more penguins were found dead at Bicheno on Saturday.

Birdlife Tasmania confirmed that five penguins have been discovered dead at the Bicheno foreshore, just days after 14 penguins were killed from a dog attack in the area.

According to Birdlife Tasmania a dog attack is the suspected cause of the deaths.

Birdlife Tasmania convenor Dr Eric Woehler said "dog owners are simply living in a state of denial."

"What do we need to do to ensure dogs are kept under control at night, particularly in coastal areas?" he said.

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The attack comes after the Glamorgan-Spring Bay Council announced it would consider implementing cameras in penguin-populated areas.

The state government also recently proposed new laws that would see dog owners slammed with a $5040 fine if their dog is found to have killed penguins.

"Clearly the increase in penalties proposed by the state government do not appear to encourage dog owners to control their pets at night," Dr Woehler said.

"Cameras and fences aren't the answer - we can't possibly protect all the penguin colonies in Tasmania.

"The responsibility lies with dog owners. If the proposed penalties are insufficient deterrence, then the government must increase them until penguins, and other wildlife, are safe in Tasmania."