If you have a dog and your house is smelling log dog then it's likely because of dog hair and dander flying through the air.
I would recommend using an air purifier with a HEPA air filter which can help eliminate the dog smell in the house like it does for my house.
Wash your dog often and dry them out completely and don't let your dog into the house if they're muddy dirty or really wet.
Clean their paws if they have mud on them too to prevent them from tracking mud into the house and brush your dog often.
Use a dander eliminating shampoo on your dog too which will help them smell better and remove the dander.
Washing your dog using some baking soda also helps eliminate dog odors.