No ominous Lovecraftian title can resist a Guinea Pig

Then, there is the classic R & B song:

When a Man Loves a Hamster

How about:

The Guinea Pigs My Destination
Tomorrow and Tomorrow and the Fairy Guinea Pigs
Have Guinea Pig, Will Travel
Hamster’s End
Synthetic Guinea Pigs of Mars

Iron Maiden: 2 Guinea Pigs to Midnight

I dont get that one, unless is a futurama quote? (“sweet guinea pig of winnipeg”)

The Narrative of Arthur Guinea Pig

no no, it should be The guinea pig of Arthur Gordon Pym

The Nameless Habitrail

The Call of Cthuddles

The Squeaker out of Time

The Nibbler in Darkness

The Hamster King has it right: “Hamster” is much funnier than “Guinea Pig”.

Lovecraft titles yet unmentioned: At The Mountains Of Hamsters. The Hamster On The Threshold.

Other stories or novels:
The Boy Who Cried Hamster
The Black Hamster

If you need a second stand-in noun, “Chicken” (another intrinsically funny animal name) works well and in some cases even better as a stand-alone.
*
The Chicken Of The Baskervilles
Who’s Afraid of Virginia Chicken?*

And of course, another famous book that once was difficult to entitle by its author(s) comes to mind:

"The title page had many titles on it, crossed out one after another … Here Bilbo’s hand ended and Frodo had written:

THE DOWNFALL
OF THE
LORD OF THE HAMSTERS
AND THE
RETURN OF THE CHICKEN"

All this guinea pig talk might prompt a legal scholar to ask: Cuy bono?

The Shadow over Hensmouth

Imprisoned with the Poultry

The Strange High Coop in the Mist

The Quest of Chanticleer

The Horror at Rhode Island Red Hook

The Capons of Ulthar

The Leghorn Fear

The Crow of Cthulhu

The Plucking of Juan Romero

Pickman’s Mud Hen

The Cock of Charles Dexter Ward

Colonel Sanders: Re-Animator

Shouldn’t that be When a Man loves a Gerbil ?

. . . we know the worth of duct tape!
It prevents explosions . . .

One of Edgar Rice Burroughs’ John Carter of Mars novels is entitled “Synthetic Men of Mars.”

Guinea Pigs and Prejudice

Fear and Guinea Pigs in Los Vegas

Hamsterberry Finn

Post #18. Although I took the other alternative

9 1/2 Wheeks

All small rodents are amusing. I just had to represent.

God-Guinea Pig of Dune

Time Enough for Hamsters

(or alternatively) Hamsters Enough for Love

The Lion, The Witch, and the Hamster

Lady Chatterly’s Gerbil

Bring me the Hamster of Alfredo Garcia

Actually, I think “The Hamster, the Witch, and the Wardrobe” conjures a more amusing mental picture.

Remember, he’s not a tame hamster!