Gastric dilatation-volvulus heads the Weimaraner's condition list, ahead of hip dysplasia and everything else. The breed carries one of the highest GDV risks in dogs, and the conformation explains it: a deep, narrow chest on a lean athletic frame.
In GDV the stomach distends with gas and then rotates, cutting off its own blood supply. Without surgery it is fatal, usually within hours.
The signs need to be known before they are needed: unproductive retching, a swelling or drum-tight abdomen, restlessness and an inability to settle, drooling, and pale gums. Any of them is an immediate emergency, not a wait-and-see.
Because the risk is so high, a preventive gastropexy — tacking the stomach to the abdominal wall during neutering — is a genuine conversation to have with a vet before the dog is a year old. It does not prevent distension but it prevents the rotation that kills.
The Akita is also deep-chested and carries a real bloat risk, though a lower one, so both households should know the signs and know where the nearest out-of-hours surgery is.