Marley is a very cute girl but she should not have bad breath its not normal for a dog to have bad breath.If she has a bad tooth that will cause the bad breath also bad teeth can shorten a dogs life considerable can cause heart problems & other problems as well. If you can take her to the vet get get her teeth checked out and cleaned then get Dog toothpaste and a dog tooth brush and brush everyday have to start out slow until she gets use to it.Then you and Marley can have a long wonderful life together.
Papbouv