Is this condition common with Dobers (in the same way that German Shepherds have hip problems) or just a terrible coincidence?
It's one of the dirty little secrets in the Doberman world. Folks were so into litter-ally pimping their dogs out that young dogs were heavily campaigned & bred before a clear picture of their health conditions could manifest.
My guys go back to a prominant dog named Thunder, whose sire made it to at least age 9. (Thunder's page on the breeders site
Our Past - Thunder | Soquel Dobermans lists almost 90 champions sired by him, including 8 belonging to one of the foremost names in dobermans, the Marienburg kennel).
Breeders are now starting to advertise that their dogs have been Holter tested, which is a 24hr EKG, doesn't prove that the dog is anything but clear the day of the test. Reputable breeders are calling for and supporting more research, along with AKC, into Dilated Cardiomyopathy, but many breeders are afraid to make the results of their dogs known.
"DCM also affects Irish wolfhounds, Scottish Deerhound, Boxer, Afghan hound, Old English Sheepdog, Great Danes, Dalmatians, Newfoundlands, and Saint Bernards are common breeds. English and American cocker spaniel breeds and Portuguese water dogs also develop DCM." from
Dilated Cardiomyopathy in Dogs (DCM)
I could go on, but that's prolly WAY more than anybody on here wanted to know. There are at least 2 littermates of Logan and Will with anxious humans awaiting the diagnosis, and ultimate outcome.
FWIW, if I stay with purebred dobers, this dog will prolly be the sire of my next pup:
Ch. Logres' Tungsten. His breeder and owner are both VERY committed to educating about and learning how to prevent/erradicate DCM in dobermans. Ironically, his owner has the human version, kinda like the cutie in Will Smith's movie "Seven Pounds".