This is a high maintenance breed. The Leonberger requires daily brushing to remove loose and dead hair and minimize shedding. Special care should be given during seasonal blowing of the coat. Bathing should be done when necessary. It is important to regularly clean the ears and provide good dental hygiene. This breed has a relatively short life span. They are prone to such health issues as hip dysplasia, OCD, Addison's disease, entropion, ectropion, osteosarcoma, bloat, and hypothyroidism. Leonberger's may be sensitive to some drugs such as sulfa, tranquilizers, and anesthetics.
If your dog is displaying behavior uncharacteristic of his normal actions, call the Vet