The Pack is a novel written by David Fisher. It was first published in 1976.
Description[]
In the August heat they frolicked on the beaches, fetched sticks, played with the children.
Then the summer dwellers left, abandoning them to the island's harsh winter. Ravenous hunger and violent rage have brought them together under a cunning, ferocious leader.
Man has betrayed his best friend - now the dogs will have their day. It's a bitter winter, and the dogs of summer have grown hungry... and vicious!