The last family in England

It's Prince who is the narrator and protagonist of this tale. An earnest young dog, he strives hard to live up to the tenets of the Labrador Pact. Mentored by an elderly labrador named Henry, whom he meets each day in the park, Prince takes his responsibilities seriously, and as things in the Hunter family begin to go badly awry, his responsibilities threaten to overwhelm him. Funny, sad, quirky, original and - incidentally - a brilliant reworking of "Henry IV" part 1.