Tenant Has Excessive Dog Barking

[Spencer Krautkramer]

I am currently house-hacking an upper/lower duplex and recently had a tenant turnover. The new tenant has a dog, which I decided to allow and had them sign a Pet Agreement. However, the dog has excessive barking whenever the tenant is not home. I am going back through the signed Pet Agreement and I do have two statements pertaining to this that read "Tenant will not allow pet(s) to cause any danger, damage, nuisance, undue noise, or health hazard," and "Dogs: Must be controlled at all times. Must be kept on a short leash while on grounds or in common areas. Barking which becomes a nuisance to other tenants will not be tolerated." Even with these statements on the signed Pet Agreement, does anyone have any suggestions for how to handle this situation? They just signed a lease recently and have 11 months left. When I've met the dog in person, it's very calm and nice; it just seems to bark a lot when its owner is not home. I'm hoping it's getting used to its new home, but that may not be the case. Any suggestions are greatly appreciated!