Smelly Dog Farts

My dog farts. It's not normal. I know it's not normal. It happens way too often, and they smell way too bad for it to be normal. And they are loud too! Most dog farts are silent, but not Chloe's. Hers make a distinct fart sound. Even she thinks it's not normal! I know this, because when she does a loud fart, she turns around and stares at her bum like, 'What the HELL was THAT?!! ... arf.'

We asked the vet about it, she suggested switching her food to something more nutritious (and therefore more expensive) - we did that. Didn't help.

We tried to test her treats to see what ones make her fart. The result: either all of them, or none of them. So that wasn't much help either.

We tried cutting back her food - so now she gets only her alotted 3.5 cups per day (ish) ... we're definitely not overfeeding now. She still farts.

So what do we do? I mean really - I love her dearly, farts and all... but it sucks living in a house full of smelly dog farts. I need some sage advice here.