Wag didn’t just screw the pooch this time — it screwed up a whole house.

An Upper West Side couple used the troubled “Uber for dogs” app to hire a sitter for their miniature pinscher Chico, but returned home to find their house had gone to the dogs after the pooch-minder went berserk and trashed the whole pad.

It’s just the latest scandal for Wag, whose walkers and sitters have lost at least nine dogs since 2015.

Fianceés Joella Jones and Jason Ruff say they left Chico with the sitter on July 13, then got an alarming phone call from the girlfriend of the sitter a few days later, saying her partner had gotten drunk and threatened to jump off their balcony.

“We got home at 1 in the morning that night. The apartment was destroyed, a soy-sauce bottle had been smashed. There was blood all over our shower curtain and shower,” said Jones, 29, of the July incident.

“There was a Post-it Note: ‘I’m truly sorry for what I’ve done to your home. Please know that I did my best to keep your pet safe.’ ”

And three months after the incident, the couple say Wag still hasn’t reimbursed them for the damage, which includes custom cabinets that Ruff designed and built himself, a smashed screen door and a hole in their shower wall which is now becoming moldy.

They say Wag has given them $600 in credit for the app, but its insurance company hasn’t paid up.

In a statement to The Post, Wag claimed it didn’t realize the insurer hadn’t resolved the situation, and said it had now reached out to the couple “to find an expedited solution.”