Cancer appears third on the Golden Retriever's condition list and it is the reason this breed's lifespan is 10 to 12 rather than higher.
The rate in Goldens is among the highest recorded in any breed. Haemangiosarcoma — a cancer of blood vessel walls, most often in the spleen or heart — and lymphoma are the two that dominate, along with mast cell tumours and bone cancer.
Haemangiosarcoma is the one worth understanding, because it is often silent until it is not. A splenic tumour can bleed suddenly, and the first sign an owner sees is collapse, pale gums and weakness in a dog that seemed well that morning. That presentation is an emergency.
What you can do is limited but real: buy from a breeder who will discuss the age and cause of death of dogs in the line rather than deflecting, keep the dog lean, and treat sudden lethargy or collapse as urgent rather than as an off day.
The rest of the list is hip and elbow dysplasia, heart disease, skin allergies, ear infections, hypothyroidism, cruciate ligament injuries, epilepsy and bloat.
The Akita's burden is autoimmune and endocrine instead, and its lifespan is slightly longer at 10 to 13 despite the greater size.