I & wife seniors have a chance to own a small 8 pound beautiful Chihuahua and Terrier mix however hes got a pee diaper for marking around the house also likes to sleep with owner in bed and is living with a larger tame Rottweiler female and we love him so much when I visited my relatives and another short note another- has any one had success with a dog trainer that would break the marking habit to rid of the diaper? should we take him with the diaper situation or not .