This is the retch-worthy moment owners of a cat in Connecticut discovered a dead mouse with some grisly passengers on Saturday (October 6).

The family cat brought in the creature, thinking the mouse was a heartfelt gift for its owner, but didn't realise the bonus feature of two squirming grubs would be something of a concern to its masters.

The owner said: "Cat brought home a dead mouse, after thanking her, I bent down to pick it up and notice something moving next to it."

They later added: "Upon closer inspection of the dead mouse we discovered two larvae, one still trying to wriggle its way out of the dead mouse's anus."

Cat brought home a dead mouse, after thanking her, I bent down to pick it up and notice something moving next to it. Upon closer inspection of the dead mouse we discovered two larvae, one still trying to wriggle it’s way out of the dead mouses anus.